Tiêu chuẩn iso 14820 1 2016

Fertilizers and liming materials — Sampling and samplePart 1: Sampling This part of ISO 1 48 0 spe ifies sampl ng plans an methods of r pr sentative sampl ng of fe ti z rs an lming mater

Fertilizers and liming materials —

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F reword v

Introduction vi

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Terms and definitio s 1

4 S mpl n plans an quantitati ve data 2

4.1 General 2

4.2 Sampl ng plans 3

4.2.1 Dete mination of the n mbe of samplng u it which form the sampled portion 3 4.2.2 Identification of the samplng u its to besampled 4

4.2.3 C le tion of incr ements 4

4.3 Q uantitative data 5

4.3.1 Mas of incr ement 5

4.3.2 Mas of single ag g r egate/r ed c d samples 5

4.3.3 Mas of multiple ag g r egate samples 5

4.3.4 Mas of final sample 5

5 Incremental samplng metho s 5

5.1 General 5

5.2 Sold fe ti z r in bulk being mo ed b convey r belt — Sto ping the belt method 5

5.2.1 General 5

5.2.2 Principle 6

5.2.3 A ppar atus 6

5.2.4 Pr oc d re 6

5.3 Sold fe ti z r in bulk — Me hanical samplng whie in motion .6

5.3.1 General 6

5.3.2 Pr oc d re

7 5.4 Sold fe ti z r in bulk — Man al samplng fr om fal ng s r eam 7

5.4.1 Principle 7

5.4.2 A ppar atus 7

5.4.3 Pr oc d re 7

5.5 Sold fe ti z r in bulk — Man al samplng method b moving the bulk 8

5.5.1 General 8

5.5.2 Pr oc d re 9

5.6 Sold fe ti z rs in p ckag es — Red ction method using a rotary me hanical sample divide 9

5.6.1 General 9

5.6.2 Principle 9

5.6.3 A ppar atus 9

5.6.4 Pr oc d re 1

5.6.5 Pr ecautions 1

5.7 Sold fe ti z rs in p ckag es — Red ction method using a rifle divide 1

5.7.1 General 1

5.7.2 A pparatus 1

5.7.3 Pr oc d re 1

5.8 Sampl ng of sold fe ti z rs in p ckag es — Man al method 1

5.9 Sampl ng fr om inte mediate bulk containe s(IBC’s) b contr oled flow

14 5.9.1 General 14

5.9.2 Principle 14

5.9.3 Safety 14

5.9.4 A pparatus 1

5.9.5 Obtaining incr ements 1

5.9.6 Pr ecautions 1

5.1 Samplng fr om inte mediate bulk containe s IBC’s- Man al method 1

5.1 1 Principle 1

5.1 2 Pr oc d r e 1

5.1 Sampl ng of fluid fe tilz rs 1

5.1 1 General 1

5.1 2 A ppar atus 1

5.1 3 Pr oc d r e 1

6 Reduction of ag g regate sample 21 6.1 General 2

6.2 Sold fe ti z rs 2

6.2.1 General 2

6.2.2 Pr oc d r e 2

6.3 Fluid fe tilz rs 2

6.3.1 A pparatus 2

6.3.2 Pr oc d r e 2

7 Di vision into final samples 22 8 Practical ar rang ements for final (laboratory) samples 22 8.1 Containe s 2

8.2 S alng of containe s 2

8.3 L bel ng of final samples 2

8.4 Disp tch of the final sample 2

8.5 Storag e of final samples 2

9 S mpl n report .23 9.1 General 2

9.2 Es ential information 2

9.3 Additional information 24

A nne x A (normative) Test for bias in mechanical sampler s 25 A nne x B (informative) Examples of tar y sample di vider 28 A nne x C (normative) Test for bias in a tary di vider 31 A nne x D (informative) Examples of ap aratus for samplng fluid fer tiizer s 32 A nne x E (normative) Methods of mix ing for fluid fer tiizer s 40

Biblog raph y 47

ISO (he Int ernational Org nization for Stan ardization) is a worldwide fede ation of national s an ards

b dies (ISO membe b dies) The work of pr p ring Int ernational Standards is normaly car ied out

through ISO t ech ical committ ees Each membe b dy int er st ed in a subje t for w hich a t ech ical

committ ee has be n es a l shed has the right t o be r pr sent ed on that committ ee Int ernational

org nizations, g ove nmental an non-g ove nmental, in laison with ISO, also take part in the work

ISO cola orat es closely with the Int ernational Ele trot ech ical C mmis ion (IEC) on al matt ers of

ele trot ech ical s an ardization

The proc d r s used t o develo this document an those int en ed for it furthe maint enanc ar

desc ibed in the ISO/IEC Dir ctives, Part 1 In p rticular the dife ent a pro al c it eria ne ded for the

dife ent ty es of ISO document should be not ed This document was draft ed in ac ordanc with the

edit orial rules of the ISO/IEC Dir ctives, Part 2 ( e www.iso.org dir ctives)

A tt ention is drawn t o the p s ibi ity that ome of the element of this document ma be the subje t of

p t ent right ISO shal not be held r sp nsible for identifying any or al such p t ent right Detais of

any p t ent right identif ied d ring the develo ment of the document wi be in the Introd ction an / r

on the ISO ls of p t ent de larations r c ived ( e www.iso.org p t ent )

Any trade name used in this document is information given for the convenienc of use s an does not

cons itut e an en orsement

F or an ex lanation on the meaning of ISO spe if ic t erms an ex r s ions r lat ed t o conformity

as es ment, as wel as information a out ISO’ s adhe enc t o the WTO principles in the Te h ical

Bar ie s t o Trade (TBT) se the fol owing URL: F or word - Sup lementary information

ISO 1482 -1:2 1 was pr par d b CEN /TC 2 0, Fertii ze s a d lmin mate ials (as EN 148 -1:2 0 )

an was ado t ed without modif ication othe than those s ipulat ed below b ISO/TC 1 4, Fertii ze s a d

soi c onditio e s

— The EN r fe enc s (EN 1482-1 an EN 148 - 2) ha e be n chang ed t o ISO r fe enc s (ISO 148 0-1

an ISO 148 0- 2)

— The def initions in 3.1, 3.4 an 3.5 ha e be n modified slghtly t o algn them with those in

ISO 8 57 :2 1 ISO 8 5 has be n ad ed t o the Biblo ra hy

— F or consist ency, “ rotating sample divide ” has be n chang ed t o “ rotary sample divide ” throughout

the t ext (The t erm “ rotary” was alr ady used in Annex es A an C in EN 148 -1:2 0 an in 5.1 in

EN 148 - 2:2 0 )

— In 4.2.2, 5.3.1, 5.6.1, 5.6.4.3.5, 5.7, 5.1 2.1 an A.3, not es ha e be n chang ed t o ful t ext

— In 5.2.3, 5.4.2, 5.6.3 an 5.7.2, the a p ratus ar now lst ed u de sep rat e subclause n mbe s

— ISO 2 0 has be n mo ed from Cla use 2 t o the Biblo ra hy;it is only cit ed aft er “ uch as” in A.5.1

ISO 148 0 consis s of the folowing p rt , u de the g ene al title Fertii ze s a d lmin mate ial s —

S mpln a d s ample pr p ratio :

— Part 1: S mpln

— Part 2 : S mple pr p ratio

This part of ISO 148 0 covers the folowing aspe t of sampl ng, de ived from the Int ernational

Stan ards an document in icat ed below but pr sent ed in a simpl fied an con ensed form The titles

of these Int ernational Stan ardsar given in the Bibl o ra hy

— Samplng plans an q antitative data: ISO 8 34, ISO/TR 5 0 , ISO/TR 7 5 an E C 7 / 3

( upe seded b R egulation (EC) No 2 0 / 0 3)

— Samplng methods:ISO 3 6 , an EEC 7 / 3 ( upe seded b R egulation (EC) No 2 0 / 0 3)

— R ed ction: ISO 741 , ISO 7 42, ISO 8 5 and E C 7 / 3 ( upe seded b R egulation (EC) No

2 0 / 0 3)

— Samplng r port : ISO 5 0 an EEC 7 / 3 ( upe seded b R egulation (EC) No 2 0 / 0 3)

ISO 148 0- 2 co e s the r d ction an pr p ration of samples for analy sis

Figur 1 gives a schematic dia ram of the sampl ng an sample pr paration proc s for sol ds

The fu damental principle of r pr sentative sampl ng is that eve y particle has an eq al chanc of

being sele t ed or r je t ed This principle cannot easi y be compled with in the case of bulk hea s

of sold fe ti z rs or larg e st orag e tan s of fluid fe ti iz rs as the majority of the mat erial cannot be

r ached b any sampl ng devic The fe ti iz r in these cases should be sampled d ring trans e , d ring

the buiding up of the hea , d ring the fil ng ofthe st orag e tank, d ring disp t ch or w he e it is being

mo ed solely for samplng purp ses

Figure 1 — Schematic dia ram of sampl ng proces for solds

Fertilizers and liming materials — Sampling and sample

Part 1:

Sampling

This part of ISO 1 48 0 spe ifies sampl ng plans an methods of r pr sentative sampl ng of fe ti z rs an

lming materials to o tain samples for physical an chemical analysis, from pa ckages an containe s up to

an inclu ing 1 0 0 k g, from fluid prod ct an from fe ti iz rs in bulk pro ided the prod ct is in motion

It is a plca le t o the samplng of lot of fe ti iz r or lming mat erial sup led or r ady for sup ly t o

third p rties, as such, or in smale lot , each of w hich would be subje t t o local, national or r gional

legislation Whe e legislation so r q ir s, samples ar taken in ac ordanc with this part of ISO 148 0

NOTE T e term “fertilizer” is used throughout the b d of this document an is taken t o inclu e liming

materials u les otherwise in icated

This part of ISO 148 0does not co e complet e, s atis ical samplng plans

2 Normati ve r eferences

The folowing document , in w hole or in p rt, ar normatively r fe enc d in this document an ar

in ispensa le for it a pl cation F or dat ed r fe enc s, only the edition cit ed a pl es F or u dat ed

r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment )a pl es

EN 1 3 , S ld fertii ze s — Tes t s iev in (ISO 83 97:198 modified)

ISO 3 1 -1, Tes t s ieves — Technic al r q ir ments a d tes tin — Part 1: Tes t s ieves o metal w ir cloth

3 Terms and definitions

F or the purposes of this document, the folowing t ermsand definitions a ply

3.1

a gre ate sample

combination of al inc ement from the lot

Note 1 to entry: T e inc ements may b grou ed to ether in eq al n mb r in order t o form several a gre at e

samples which can b red ced an analysed separat ely for the p rpose of statistical int erpretation

proc s of prod cing a n mbe of r pr sentative smale p rtions, a pro imat ely eq al in mas t o each

othe , from a larg er mas

final sample

r pr sentative p rt of the r d c d sample or, w he e no int ermediat e r d ction is r q ir d, of the

a gr g t e sample

Not e 1 t o entry: Of en, more than one sample is prepared, at the same time, from the red ced sample (or from

the a gre at e sample) One or more of these f inal samples wil b used as a la oratory sample or as la oratory

samples, while other may b st ored for reference p rposes

[ SOURCE:ISO 8 57 :2 1 , 2.6.6]

3.5

inc ement

r pr sentative q antity of mat erial taken from a sampl ng u it

Not e 1t o entry: T is may b constituted from a n mb r of partial samples

r pr sentative part of the a gr g t e sample o tained b a proc s of r d ction in such a man e that

the mas a pro imat es t o that of the final (la orat ory) samples

defined q antity of mat erial ha ing a b u dary, w hich ma be phy sical (e.g a containe ) or hy othetical

(e.g p rticular time or time int erv l in the case of a flow of mat erial)

3.11

sampled portio

q antity of a mat erial consis ing of al the sampl ng u it from w hich inc ement ar t o be taken an

ha ing charact eris icspr sumed t o be u iform

4 Sampl ng plans and quantitati ve data

Cor e t samplng is a diff icult o e ation w hich r q ir s gr at car The ne d t o o tain a fuly

r pr sentative sample for b th the chemical and phy sical t es ing of fe ti iz rs cannot be s r s ed t oo

much Samplng plans ha e be n prod c d t o co e a rang e of q antitiesof fe ti z r and these form the

b sis of seve al Int ernational Standards ( e the Biblo ra hy)

The sampl ng plans given in this p rt of ISO 148 0 ar not b sed on s rict s atis ical principles but

samples o tained b folowing the proc d r s desc ibed in this clause shal be conside ed t o be

r pr sentative of the original lot or sampled portion

This cla use spe ifies samplng plans for the ev luation of delve ies of fe ti iz rs as wel as s atut ory

control plans w hich ha e t o be folowed in c rtain cir ums anc s

F or s atut ory control an the simple comme cial ev luation of a smal q antity of fe ti iz r, one f inal

sample is sufficient but his ma subseq ently be divided int o a n mbe of identical samples

F or the comme cial ev luation of a larg e del ve y w hich is sup led for r sale in smale lot , a n mbe

of samples r pr senting part of the del ve y ar r q ir d in orde t o as es the v ria i ity of the lot

NOTE F or e ample, a delivery of 5 0 0 t should b tre ted as at le st f ive deliveries of 10 0t e ch an f ive

separat e samples should b colect ed an prepared T e det ermination in this part of ISO 148 0 is b sed on a

simple relationship b tween the amou t o b sampled an the minimum n mb r of inc ements to b taken

The methods of sampl ng t o be used ar desc ibed in Clause 5

4.2 S mpl ng plans

4.2.1 Determinatio of the number of samplng u its which for m the sampled portion

4.2.1.1 General

The n mbe of sampl ng u it from w hich inc ement ar t o be taken depen s on the siz of the lot

4.2.1.2 Pr oduct in packag es or c ontainer s

In the case of prod ct in p ckag es or containe s, the sampl ng u it is a p ckag e and the n mbe of

in ivid al p ckag es from w hich inc emental samples ar t o be taken should be in ac ordanc with

Ta le 1 In this cont ext, a p ckag e is normaly taken t o hold no mor than 5 kg – larg er containe s such

as Int ermediat e Bulk C ntaine s (IBC’ s) should be tr at ed ac ording t o the proc d r in 5.9 or 5.1 F or

p ckag es weighing les than 1 kg each, it might be ne es ary t o inc ease the n mbe taken t o ensur a

suff iciently larg e a gr g t e sample

Table 1 Number of in ividual packag es from w hich inc emental samples are to be taken

More than 4 an u t o 1 packa es 4

More than 1 an u to 40 packa es T e ne rest whole n mb r a ove the sq are ro t of the n mb r of

packa es present

4.2.1.3 Pr oduct in bulk

In the case of prod ct in bulk, the n mbe of samplng u it from w hich inc emental samples should

be taken depends on the t otal mas pr sent The n mbe of sampl ng unit t o be sampled should be in

ac ordanc with Ta le 2

Table 2 Number of sampl ng units from w hich inc emental samples are to be taken

4.2.2 Identification of the samplng units to be sampled

4.2.2.1 Sol d and fluid fer tiizer in packag es or co tainer

Identify the packag es in the lot or sampled p rtion conse utively an , b using a sour e of ran om

n mbe s, sele t he p ckag es from w hich inc emental samples ar t o be taken an mark them

4.2.2.2 Sol d and fluid fer tiizer in bulk dur ing mo ement

Whe e the mo ement r lat es t o lo ding or unlo ding using gra bing eq ipment such as a c ane or

a ut omatic sho el lo de , the samplng u it is the q antity of mat erial cor espon ing t o one gra If the

mo ement is a contin ous o e ation such as on a convey r belt or through a pipe, each sampl ng u it is

made up of a mas of no mor than 5 t

Calculat e the n mbe of samplng unit pr sent from the t otal mas an b using a ta le of ran om

n mbe s sele t the samplng u it from w hich inc ement ar t o be taken d ring the mo ement

Numbe the sampl ng u it in chronolo ical orde of their formation Es imat e the time taken for the

mat erial t o p s the sampl ng p int

Divide this time int o eq al time int erv ls such that the n mbe of int erv ls is at leas twic the

minimum n mbe of samplng u it t o be sampled in ac ordanc with Ta le 2 an each sampl ng u it

is not mor than 5 t The time int erv ls ar the samplng u it From these samplng u it , ran omly

sele t the n mbe from w hich inc ement ar t o be taken W ithin each of the sele t ed sampl ng unit ,

ran omly sele t a time at w hich the inc ement ist o betaken

As the e wi l be some v riation in the spe d of the belt or the flow in the pipe an the q antity at any

one p int, it is r commen ed that he n mbe of sampl ng u it sele t ed beat leas 1 % mor than the

minimum in Ta le 2

A ut omatic me hanical sample s normaly work at fix ed time int erv ls In this case, the inc ement

ar cole t ed o e the w hole timescale an cannot be r g rded as ha ing be n taken ran omly F or

legislative purp ses, the me hanical sample shal be o e at ed at the sele t ed ran om times

4.2.3 C l ection of incr ements

4.2.3.1 General

Al inc emental samples shal be of a pro imat ely the same mass /v lume

4.2.3.2 Sol d fer tiizer in packag es or co tainer s up to and including 50 kg

Take one inc ement from each of the sele t ed p ckag es ( ampl ng u it 4.2.2.1), b the use of a divide

(5.6 or 5.7) or b the man al method desc ibed in 5.8

4.2.3.3 Product in inter mediate bulk ntainer

Cole t the r lev nt n mbe of inc ement b using the method desc ibed in 5.9 an / r 5.1

4.2.3.4 Sol d fer tiizer in bulk

Cole t the r lev nt n mbe of inc ement b using one of the methods desc ibed in 5.2 t o 5.5

4.2.3.5 Fluid fer tiizer

F olow thea pro riat e proc d r desc ibed in 5.1

4.3 Quantitati ve data

4.3.1 Mas of increments

Inc ement should normaly be of at leas 2 0 g each F or blen ed fe ti z rs an for l ming mat erials

co rse than 8 % p s ing 0,3 5 mm, the minimum mas of each inc ement should be 5 0 g F or

p ckag es weighing 4 kg or les , the entir cont ent ar taken as the inc ement

4.3.2 Mas of single ag g r egate red c ed samples

Combine an mix al the cole t ed inc ement When ne es ary, r d c the a gr g t e sample as

desc ibed in Cla use6, so that he f inal mas for chemical t es ing is at leas 2 kg an for phy sical t es ing

at leas 4 times the ma imum amount r q ir d for the physical t es method

4.3.3 Mas of multiple ag g r egate samples

Combine an mix al the cole t ed inc ement for one sample befor r d ction t o f inal samples Each

sample shal ha e at leas a f inal mas eq al t o 4 times the ma imum amount r q ir d for t es ing

R epeat thisproc d r for each sample

4.3.4 Mas of final sample

The mas of each final sample for chemical analy sis shal be at leas 5 0 g F or phy sical t es ing, the

mas is depen ent on the t est (s) t o be car ied out

5.1 General

Packag es of up t o an inclu ing 5 kg in mas ma be sampled b a proc s of r d ction ( e 5.6),

s arting with the t otal cont ent of the p ckag e, or b spear samplng from the sele t ed p ckag es but

the latt er only w hen the prod ct is u iform or a single chemical ( uch as ur a, ammonium nitrat e or

ammonium sulfat e) an the samplng is only for chemical analy sis Int ermediat e bulk containe s ar

bes sampled b the method desc ibed in 5 9 Al packag es an IBC’s ma be sampled b emptying the

cont ent as in the method desc ibed in 5.8

Me hanical samplng devic s, if ins aled in a trans e sy st em, can be used t o cole t inc ement ,

pro ided they ha e be n t est ed for the a senc of bias ( e Annex A)an the timing of theinc emental

samples can be controled man al y

The sampl ng a p ratus shal be clean, dry an ine t ( i.e fa ricat ed of mat erials w hich wi l not afe t

the charact eris ics of the fe ti iz rs t o be sampled)

Al sampl ng o e ations should be car ied out in such a wa as t o minimiz chang es t o sample

pro e ties, e.g mois ur cont ent

5.2 S l d ferti izer in bulk being moved by c onveyor belt Stopping the belt method

5.2.1 General

The sample is taken from a conveyor b st op ing the belt

Taking a r pr sentative sample from a consignment of fe ti iz r b samplng from a convey r b

st op ing the belt is time-consuming an int er upt the lo ding or unlo ding proc s conside a ly The

method should, the efor , only be used if no othe , mor convenient, method is a aia le

NOTE T is sampling t ech iq e is also used as a reference method t o as es the ac uracy of other tech iq es

or ap aratus

WARNING This samplng meth d inv lves co tact with machinery w hich is normal y in

motio It is es ential that precautio s be taken so that there is no pos ibiity of the co vey r

starting up w hi e the inc ements are being taken An over ide start/stop b tton sho ld be

pro ided at the point of sampl ng

The sample shal be a le t o r ach the w hole c os -se tion of the belt without u d e phy sical s rain

The p sition for samplng should be made as safe an convenient as p s ible, for ex mple b using a

suita le plat orm

5.2.2 Principle

St op ing of the belt conveying the fe ti z r Inse tion of two p ralel rigid she t int o an at right

angles t o the s r am of fe ti iz r an t o the a is of the conveyor belt R emo al of the mat erial betwe n

the she t as an inc ement

5.2.3 A pparatus

5.2.3.1 T wo paralel r ig id she ts, sha ed to the char acte is ics of the tr ough of the belt , suficiently

long to pr oje t bey n the sides of the belt b a out 5 0 mm and suficiently wide for the up e edg e to

be at leas 5 mm a o e the to of the fe ti z r on the belt

It is r commen ed that a metal frame be made t o car y the rigid she t This frame can then be plac d

ac os the belt in a single o e ation Fai ing this, two marks should be made on the supp rting s ructur

on each side of the belt o that he she t can be inse t ed in the same plac s each time

5.2.4 Pr oc edur e

St op the belt at the times sele t ed as desc ibed in 4.2.2.2 Onc the belt has st op ed, inse t the two

paralel rigid she t (5.2.3.1) at a sufficient dis anc a art t o give an inc ement of at leas 1 kg as folow s:

a) if the convey r belt is horizontal, inse t the she t ve ticaly downwards int o the s r am of

fe ti iz r;

b) if the convey r belt isincl ned, inse t the she t q ickly, at right anglest o the s r am, so ast o a oid

any b ckflow

Push any fe ti iz r o s ructing the inse tion of the she t as folow s:

— in the case of the downs r am she t, int o the sample;

— in the case of the ups r am she t, out of the sample

As q ickly as p s ible, complet ely r mo e the mat erial between the two p ralel rigid she t int o a

suita le air-tight containe

R emove the she t an make sur that nothing has be n lef on the belt w hich could cause damag e

furthe down R es art the belt

R epeat the proc s for each inc ement

5.3 S l d ferti izer in bulk Mechanical sampl ng whi e in motion

5.3.1 General

Me hanical sampl ng devic s ins aled in a fe ti iz r han lng sy st em ar a convenient means of

cole ting samples pro iding the timing of the taking of the inc emental samples can be controled

man aly t o alow ran omnes in sampl ng times A n mbe of dife ent ty es ar a ai a le an this

p rt of ISO 148 0 doesnot r commen any p rticular ty e o e anothe Al might be suita le pro ided

they ha e be n shown t o be ca a le of o e ating without bias Befor any samples ar taken b the

devic for control purp ses, it should be che ked for bias using the proc d r desc ibed in Annex A

The An ex A bias che k t es is a plca le t o any form of me hanical samplng devic ins al ed at some

p int in a bulk han l ng sy st em, pro iding that eithe the fe ti z r p s es along a convey r belt, befor

or aft er thedevic , or it is subseq ently p cked in b gsin orde that a r fe enc cole tion can be made

The me hanical sampl ng devic ma be used for the cole tion of samples for chemical analy sis as wel

as for physical t es ing

5.3.2 Proc edure

Obtain inc ement b o e ating the me hanical sampl ng devic at the times sele t ed as desc ibed in

4.2.2.2

5.4 S l d ferti izer in bulk Manual sampl ng fr om fal ing stream

WARNING Manual sampl ng from b lk ferti izer in motion sho ld o ly be undertaken w hen

the o eratio s can be performed safely

5.4.1 Principle

R epr sentative inc ement ar taken b means of ran omly timed cut of the s r am

5.4.2 A pparatus

5.4.2.1 Stainles ste l samplng cup

To sample a fr e-fal ng s r am as shown in Figur 2, a s ainles st eel samplng cup shal be used as

shown in Figur 3 The length of the cup should be at leas thr e times the depth of the fal ng s r am

t o be sampled an the edg es of the o ening shal be thin t o ensur a clean cut The minimum ca acity

should be 5 0 g, thema imum ca acity should be 5 kg Thewidth of theactive o ening of the cup shal

be at leas thr e times the ma imum diamet er of the p rticles of the prod ct t o be sampled

5.4.3 Pr oc edure

Sample the fe ti z r d ring the fr e fal b ar anging the sampl ng cup (5.4.2.1) in such a w ay that it

p s es horizontaly through the fal ng s r am E sur that the samplng cup ext en s complet ely through

the s r am ( e Figur 2) E sur that the samplng cup w hen not in use is prot ect ed from the s r am

Pas the cup through the s r am at ran om times within each samplng u it as designat ed in ac ordanc

with 4.2.2.2, throughout the trans e o e ation Make sur that p s es ar made at a u iform spe d

such that the cup is a pro imat ely half f il ed each time

Empty the cont ent of the cup from each p s int o a suita le air-tight containe

a dir ection of sampling cu movement

Figure 2 — Metho of sampl ng a fre -fal ing stre m

Figure 3— Example of stre m sampl ng cup

5.5 S l d ferti izer in bulk Manual sampl ng method by moving the bulk

5.5.1 General

Whe e the fe ti iz r t o be sampled is in a bulk s atic hea an is not t o be mo ed at a time or b a

method convenient for any of the othe methods of sampl ng desc ibed a o e, then the hea wi l ne d

t o be mo ed b the samplng official

This can be achieved b using a me hanical shovel t o mo e the fe ti z r w hich is then p s ed eithe

through an o e head ho pe , with a control a le b tt om outlet and of suff icient v lume t o take at leas

one sho elful from the me hanical sho el, or along a convey r belt

5.5.2 Pr oc edure

The in ivid al sho el cont ent ar taken as the samplng u it S le t the unit t o be sampled using

ran om n mbe s Obtain inc ement from each sele t ed samplng u it b eithe of the folowing means:

a) pas ing through an o e head ho pe Calculat e the time it wi take for the sele t ed sampl ng u it

t o pas through the ho pe L ad the fe ti iz r int o the ho pe an o tain inc ement using the

method for samplng IBC’s in 5 9 Al inc ement should be of a pro imat ely the same mas an

st or d in an air-tight containe u ti r q ir d t o form the a gr g t e sample;

b) lo ding it ont o a convey r belt and taking inc ement at times sele t ed as desc ibed in 4.2.2.2 using

themethods desc ibed in 5.2, 5.3 or 5.4

5.6 S l d ferti izer in packag es Reduction method using a r otary mechanical

sample di vider

5.6.1 General

This subclause spe ifies a method suita le for the r d ction of a mas of a sold fe ti iz r t o a smale

q antity w hich forms the inc emental sample from the p ckag e

The method ma also be used t o pr p r r d c d samples, f inal samples or la orat ory samples

By cho sing suita le eq ipment, the method is a plca le t o the r d ction of a sample of any mas

a o e a minimum defined b the siz an n mbe of particles

5.6.2 Principle

Pas ag e of the mate ial through a rotary me hanical sample divide C le tion of the fractions,

folowed b r je tion or r combination of some of the fractions t o give the desir d q antity for the

inc emental sample

5.6.3 A pparatus

5.6.3.1 Rotar y sample di vider

R otary me hanical sample divide s ar of seve al basic ty es They can o e at e b cole ting

sub-samples from a fal ng s r am (cutt er ty e) or b extracting a hel cal rib on from a fal ng cy lin rical

curtain, such as is c eat ed b alowing the fe ti z r t o fal ont o the a ex of a cone dis ribut or In the

case of the cutt er ty e, each sub-sample consis s of a complet e c os -se tion of the s r am

The sample divide is fed from a ho pe f itt ed with one of a se ies of int er hang ea le orif ic s so that the

c it eria below can be met

A s an ard divide o e at es at a rotational fr q ency of a out 6 rou ds min

−

but this rotational

fr q ency can be inc eased up t o a out 3 0 rou ds min

−

, the v rianc of the sample division being

r d c d as a larg er n mbe of sub-samples ar taken Howeve , car is ne ded t o ensur that he e isno

bias be ause of larg er p rticles b u cing on the ra idly mo ing edg es of the sample r c ive or be ause

particles ar shatt er d

The ho pe can be on the ve tical a is of the r c ive , fe ding via the dis ributing cone, or of-c ntr

w hen no such cone is ne ded

Ex mples of rotary sample divide s ar shown in An ex B, Figur s B.1, B.2 an B.3

Al sample divide s shal conform t o the folowing basic r q ir ment

a) The efe tive o ening of the cutt er or slot hal beat leas thr e times, but pr fe a ly five times, the

ma imum particle siz of the fe ti iz r t o be divided In practic , this meansa minimum dimension

of at leas 1 mm

b) The divide shal be cons ruct ed an o e at ed in such a man e that eve y p rticle has an eq al

o p rtu ity of being inclu ed in the sub-sample Pro ided that al part of the s r am ar sampled

in d e pro ortion, an unbiased sample should be o tained

c) During r d ction, the e shal be at leas 5 rotations of the cup()so that at leas 5 inc ement ar

taken from the gros sample at each s ag e of division

5.6.3.2 Test for bias

A suita le t es for bias is given in Annex C

5.6.4 Proc edure

5.6.4.1 General

F olow theproc d r spe if ied in 5.6.4.2, or 5.6.4.3 depen ing on the mas of the bulk sample

5.6.4.2 S mple smal enough for the ap aratus to handle the wh le quantity in o e pas

5.6.4.2.1 S t the r otary sample divide (5.6.3.1) in motion an alow time for it to reach it s eady

rotational fr eq ency (a pe iod of 1 s to 2 s is normaly suficient)

Fi l the fe d ho pe from the content of the packa e and o en the r taining devic at the b se of

the ho pe

To up the ho pe from the r main e of the cont ent of the p ckag e, making sur that at no time can

mat erial ru dir ctly from the sample containe through the ho pe outlet

Contin e u ti theentir cont ent of the p ckag e has p s ed through thedivide

5.6.4.2.2 Depen ing on the siz of the incremental sample r eq ir ed, takean combinean a pr opriate

n mbe of the sub-samples pr od c d b the divide Plac in an air-tight containe an discar d the

remain e

5.6.4.2.3 Repeat the o erations desc ibed in 5.6.4.2.1 and 5.6.4.2.2 on thecombined fractions if furthe

red ction is ne ded

5.6.4.3 S mple to lar g e for the ap ar atus to handle in o e pas

5.6.4.3.1 F low the pr oc d r e descr ibed in 5.6.4.2.1

Contin e t o t op up the ho pe from the r main e of the cont ent of the p ckag e, making sur that at no

time can mat erial ru dir ctly from the sample containe through the ho pe outlet, unti the cole ting

devic s ar a out 8 % (v lume fraction) ful

5.6.4.3.2 Depen ing on the siz of the incremental sample r eq ir ed, take an combinean a pr opriate

n mbe of the sub-samples pr od c d b the divide an plac them in an air-tig ht containe Discar d the

remain e

5.6.4.3.3 Repeat the o erations desc ibed in 5.6.4.3.1an 5.6.4.3.2, ad ing the sele ted fractions to the

containe and discarding the r emain e , as ofen as is ne es ary to completely empty the p ckag e

5.6.4.3.4 If the mas es of the sub-samples pr od c d dife fr om each othe b mor e than 3 % (mas

fr action), folow the pr oc d re desc ibed in 5.6.4.3.5

5.6.4.3.5 Divide the orig inal p ckag e contents into n eq al p rts b weig hing (n =M/m, wher e M is the

total net mas of the orig inal p ckag e an m is the ca acity of the divide )

Pas the firs of the n part through the divide in ac ordanc with 5.6.4.2

Take a n mbe of the sub-samples depen ing on the mas of the inc emental sample r q ir d an the

v riation betwe n the sub-samples Plac this (or these) sub-sample() in an air-tight containe an

discard ther main e

R epeat these o e ations on the r main e of the n p rt , ad ing the sele t ed sub-samples t o the

containe The mas es of the p rtions cole t ed from the n o e ations should be as nearly as pos ible

eq al t o each othe

Pro ided that a rotary sample divide is used throughout for the r d ction, it is not ne es ary t o mix

the mat erial p s ed through befor furthe r d ction in ac ordanc with 5.6.4.2.3

5.6.5 Precautio s

5.6.5.1 Ensur e that al eq ipment is clean an dry befor e use

5.6.5.2 Car y out al the o erations desc ibed in 5.6.4 as rapidly as pos ible to a void los or gain of

mois ur e

5.6.5.3 Stor e samplesin air-tig ht containe s exc pt d ring the actual pr oc s of r eduction

5.7 S l d ferti izer s in packag es Reduction method using a rifle di vider

5.7.1 General

If a suita le rotary sample divide is not a aia le, or can ot be used for lack of p we sup ly, it is s i l

p s ible t o o tain inc emental samples b othe r d ction methods The proc d r desc ibed in 5.7.2

is k own t o be les pr cise an might introd c bias The ext ent of this bias wi depen on the natur

of the fe ti z r an the t es s w hich ar subseq ently t o be car ied out F or ex mple, the s an ard

deviations for the r sult of p rticle siz analy sis of r plcat e samples o tained b the two methods of

r d ction desc ibed an b coning an q art ering ( e 6.2.2.3)ar in the folowing a pro imat e ratios:

5.7.2.1 Rifle di vider

A rif le divide is a two-wa divide without mo ing p rt It consis s of a ho pe ha ing two ve tical

sides an two slo ing sides w hich run the ful length of the rifle divide The ho pe fe ds a se ies

of at leas 1 r ctangular slot , each ha ing a width of at leas twic the ma imum p rticle siz plus

5 mm Each slot cons itut es an o ening t o a ch t e; alt ernat e ch t es delve in o p sit e dir ctions t o

two r c ive s Rifle divide s ar comme cial y a ai a le in many siz s ranging from bench siz t o larg e

flo r-mou t ed models

An ex mple of a rif le divide is given in Figur 4.

5.7.3 Proc edure

W ith the r c ive s in p sition, tip thefe ti z r from the p ckag e g ently int o the ho pe right ac os the

width of the rif le divide (5.7.2.1), so that a thin curtain of mat erial fal s verticaly an eq aly int o al

the slot If a ve tical curtain is not maintained, then mor mat erial wi l t en t o fal int o the r c ive

furthes from the o e at or, giving u eq al an biased samples

F or p ckag es w hose v lume is les than the ca acity of the rif le divide , discard the cont ent of one

r c ive an if the q antity is gr at er than the mas r q ir d for the inc emental sample, pour b ck the

cont ent of the othe through the rifle divide int o two fr sh r c ive s

Depen ing on the degr e of r d ction, r peat this proc s , the cont ent of alt ernat e r c ive s being

discarded

Packag es w hose v lume is gr at er than the ca acity of the rifledivide should be divided int o p rtions

of eq al siz , each being within the ca acity of the rif le divide Rif le each portion sep rat ely, the

cont ent of one containe being r tained an those of the othe s being discarded Mix the r tained

mat erial wel an divide it a ain int o eq al p rtions, each within the ca acity of the rifle divide

R epeat he rif lng proc d r u ti the sample siz is within the ca acity of the rif le divide

Plac al inc emental samples in an air-tight containe u ti r q ir d t o form the a gr g t e sample

1 alternate sections deliver ed on this side

Figure 4 Rif le sample divider

Mixing, if ne es ary, ma be efe t ed b p s ing al the mat erial through the rif le divide thr e times,

r combining it between each p s

Rif lng should be car ied out as q ickly as p s ible t o a oid los or g in of mois ur

F eeding the ho pe from alt ernat e r c ive s from alt ernat e dir ctions helps t o elminat e biases d e t o

impr ciseengine ring an han lng t ech iq e

Eq al mas es dife ing b les than 5 % (mas fraction)should be o tained

5.8 S mpl ng of sol d fer ti izer in packag es — Manual method

Empty the cont ent of each p ckag e sep rat ely ont o a clean dry surfac , mixing thoroughly with a

sho el ( e Figur 5) an r mo e one sho elful as the inc emental sample from that p ckag e R eturn

the r main e t o the p ckag e St or samples in airtight containe s

2

Key

l leng th of the shovel blade

w w idth of the shovel blade

Figure 5 — Example of a sho el

5.9 S mpl ng from intermediate bulk c ontainer (IBC’s) by c ontr ol ed flow

5.9.1 General

This method a ples in cir ums anc sw he e the mat erial isfr e-flowing an the IBC is not t o be r used

Ex mples would be in a fact ory w he e the mat erial can be r -cir ulat ed an r -p cked or on a farm

w he e the mat erial isa out t o be used

5.9.2 Pr inciple

Containe s from w hich inc emental samples ar t o be o tained ar sele t ed in ac ordanc with 4.2.2.1

an Ta le 1in 4.2.1.2 Each containe is then tr at ed as a q antity of lo se mat erial an in ivid al

sub-samples ar taken from each as if they wer inc emental samples, the n mbe ofsub-samples being

de ided b r fe enc t o Ta le 2 in 4.2.1.3

5.9.3 S fety

The folowing pe sonal prot ective clothing isr commen ed:

— wat erpro f b ot with t oe prot ection, o e als, glo es, hard hat, g og les, d s mask

Critical safety point :

a) f ixing thes ra s arou d lf ing devic t o se ur fun el;

b) positioning of al pe sonnel w hie the lf ing devic with IBC/ fu nel is being p sitioned o e the

r c ptacle;

c) ensuring that no pe son works dir ctly un e the eq ipmen

d) ensuring that st eplad e s, if used, ar at ached t o a suita le sold o je t

5.9.4 A pparatus

5.9.4.1 Flow c ontrol funnel

The fun el should be cons ruct ed as shown in Figur 6 Dimensions ar not c itical though it is

r commen ed that the out low be 5 mm sq ar This gives a r asona le flow rat e of a pro imat ely

3 t·h

−

Dimensions in milimetr es

Key

1 eye b lts thr oug h ang le ir on (Suspension: “U” shackles 1 mm with b lting sew n through)

2 sloted ang le ir on reinfor cement

3 level of g ril an of he d of material heig ht line, 1 0 mm fr om top of fu nel

4 1 0 mm plywo d or ap r opriate material

5 hing e

6 hing ed gate to pr event low

7 ho k an eye to ke p gate closed when r eq ir ed

Figure 6 — Flow co trol funnel (top elevatio , side elev ation, end elevatio )

Draw a marke l ne rou d the inside of the fu nel a pro imat ely 1 0 mm from the t op; the level of

mat erial in the fu nel should not be alowed t o dro below this mark This maintains the head of

mat erial an the eb the consist ency of the flow-rat e

A metal gri ha ing b rs a pro imat ely 2 mm a art fit inside the fu nel at marker lne level t o cat ch

larg e lumps of mat erial

Suspension of the ho pe shal be b s ra s of suita le mat erial, i.e wir , chain or fa ric belting This

shal be se ur ly f ix ed t o the “U” shackles, w hich in turn ar se ur d t o the eye b lt The suspension

mat erial, it f ixing method, the “U” shackles, the eye b lt an the frame shal be ca a le of sup orting

at leas 1 t

5.9.4.2 Paddle to ntr ol outflow from IBC into funnel

A pad le a pro imat ely 40 mm b 2 0 mm with a 1,2 m han le is ne ded t o co e the hole c eat ed in

the b se of the IBC so that the level of mat erial in the fu nel is kept at the desir d height

5.9.4.3 S mple taker

A smal o en tra a pro imat ely 1 0mm ×1 0 mm with 2 mm sides with a 1,2 m han le

5.9.4.4 F r k lf truck or othe simi a lfing devic e ca a le of lfing an IBC a pr oximately 2,5 m

a o e the level of ther ec ptacle into which the fe ti z r is to flow

5.9.4.5 Suitable set of step lad er (1,5 m wor king height should be suficient)

5.9.4.6 Suitable cut ing blade on a 1,2 m han le to cut o en the b se of the IBC

5.9.4.7 Cle n, dr y plastic ntainer with air-tig ht ld ca a le of holding 2 kg to 25 kg of mate ial

5.9.4.8 Random number tables or g enerator

5.9.4.9 Stopwatch

5.9.4.10 Calculator

5.9.5 Obtaining increments

5.9.5.1 General

To ensur a r pr sentative sample, each IBC is tr at ed as a sep rat e lo se amou t an at leas

1 inc ement should be taken from each IBC The inc ement ar taken at ran om times sele t ed as

desc ibed in 4.2.2.2

5.9.5.2 Proc edure

Det ermine the n mbe of IBC’ s t o be sele t ed from the lot an from the sampled p rtion b r fe enc t o

Ta le 1 in 4.2.1.2 an sele t them ran omly from the sampled portion

Lif each sele t ed IBC in turn of the groun an fit the flow control fun el (5 9.4.1) beneath it This is

achieved b pas ing the suspension s ra s arou d the arm of the l f ing devic , down each side of the

IBC an at aching t o the fu nel suspension p int Lea e a g p of a pro imat ely 3 0 mm betwe n the

b se of the IBC an the t op of the fun el t o alow ac es for the cut ing blade (5 9.4.6) an the control

p d le (5.9.4.2) The g p can be adjust ed b furthe lo psof the sup orting s ra rou d the l f ing arm

Raise the IBC an fun el t og ethe an p sition o e the r c ptacle Plac the plas ics containe (5 9.4.7)

in such a p sition that he sub-samples taken can be emptied int o it as so n as p s ible without spi lng

any cont ent It is r commen ed that he same pe son takes al the sub-samples from al the IBC’ s t o be

sampled t o ensur a consist ent mas of sub-sample

A minimum of two peo le is r q ir d t o take the sub-samples The f irs pe son ne ds t o ha e ac es t o

the b se of the IBC at the g p lef betwe n it an the t op of the fu nel This ma be b use of the st eps

or othe safe working p sition A t no time should this pe son be dir ctly un e theIBC Al implement

should ha e han les w hich alow safe ac es The se on pe son should take up a p sition such that

he /she can safely take sub-samples right ac os the out low from the base of the fu nel using the

sample taker (5 9.4.3)

Using the cut ing blade (5 9.4.6) make an X cut in the b se of the IBC 1 0 mm t o 2 0 mm long dir ctly

a o e the fun el E sur that he cut g oes through b th the out er mat erial an the inne p lyethy lene

Control the flow of prod ct int o the fu nel b co e ing the hole with the pad le (5 9.4.2) an st op

the flow w hen the mat erial r aches the marked l nes inside the fun el t o ensur a consist ent head of

mat erial an flow-rat e

It isimp rtant that al mat erial p s es through the fu nel - none should be los o e the side

Open the hing ed g t e at the b se of the fun el an s art the st op wat ch (5.9.4.9) Take sub-samples

ac os the w hole flow at hetimes sele t ed as desc ibed in 4.2.2.2

If for any r ason the head of mat erial fals signif icantly below the l nes, sh t the g t e an st op the st op

wat ch unti the pro lem hasbe n r solved

Br ak up any larg e lumps ca ught on the gri using the p d le or othe suita le eq ipment so that al the

mat erial flow s through the fu nel If ne es ary, st op the flow an the st op wat ch t o alow the br aking

up t o takeplac

Plac al the sub-samples in the containe (5 9.4.7) forming the inc ement

R epeat he proc s for each IBCfrom w hich an inc ement is t o be taken, ensuring that the same n mbe

of sub-samples is taken from each

Mix al the inc ement ( ub-samples) from al the IBC’ s t o form the a gr g t e sample

Proc ed with r d ction and division t o f inal samples ( e Cla uses 6 an 7)

5.9.6 Precautio s

Do not eparat e the t opof the in e p lyethy lene b g from the suspension han les of the IBC Doing so

wi alow the inne b g t o sl p down an o s ruct the hole in the IBC d ring the f inal emptying s ag e If

the in e p lyethy lene b g is not se ur d t o the han les, use s ring t o ensur it isso se ur d

If the prod ct is d s y, f ix a curtain of fa ric or pa e t o the b se of the IBC arou d as much ofthe hole

as it is practica le bearing in min the ne d for p d le ac es The curtain should ext en downwards t o

the surfac of the mat erial in the ho pe th spr venting los of d s

5.10 S mpl ng from intermediate bulk c ontainer IBC’s - Manual method

5.10.1 Pr inciple

This method is used w hen the IBC is t o be r filed The method is extr mely phy sical y deman ing an

should only be used as a las r sort It inv lves tr ating the IBC as a packag e asin 5.8

5.10.2 Proc edure

Proc ed asdesc ibed in 5.8 or, if a suita le larg e me hanical sample divide or rif le divide is a ai a le,

5.6 or 5.7 Be ause of the bulk of the IBC’s at leas four sho elfuls should be taken from each IBC

5.11 S mpl ng of fluid ferti izer s

5.11.1 General

F or safety r asons, man al sampl ng (5.1 2.2) is not r commen ed for fluid prod ct containing fr e

ammonia

Solutions, slur ies an suspensions ma be sampled man aly pro ided the prod ct is homog eniz d

( e Annex E for methods of mixing an as ociat ed pr cautions)

The e is a risk that p rtions of multiphase fluids, sampled through nar ow tubes or a e tur s, might

not be truly r pr sentative C nseq ently, it is imp rtant t o ensur that the int ernal dimensions of the

samplng devic s ar suff iciently larg e, i.e in ther gion of 5 mm, t o a oid this pro lem

5.11.2 A pparatus

5.11.2.1 General

The samplng a p ratus shal be clean, dry an made from mat erials w hich wi not afe t the

charact eris ics of the fe ti z r t o be sampled

The spe ial pro e ties of fluid fe ti iz rs, inclu ing v p ur pr s ur an s ratif ication should be taken

int o ac ou t w hen cho sing sampl ng a p ratus

5.11.2.2 Manual sampl ng devic es

5.11.2.2.1 T ube that can be intr od c d ve ticaly into a tan or containe and ca a le of closur e at one

or b th en s T ypical devic s ar e i ustrated in A nnex D, Fig ur es D.1 and D.2

5.11.2.2.2 eighted bot le or other ves el, ca a le of being lowered into the prod ct , sealed with a

devic to ena le it to be o ened at any spe ific depth A v riant of this pr ovides for g r ad al fi ing of the

sample b ttle as it is lower ed from the surfac of the fluid to the b se of it containe T ypical devic s are

i us r ated in A nnex D, Fig ur es D.3, D.4 and D.5

5.11.2.3 Co tinuo s sampl ng devic es

5.11.2.3.1 S mple val ve o the storag e ves el (i ustrated in A nnex D, Fig ur e D.6)

5.11.2.3.2 S mple val ve on a loading lne o t of the storag e ves el (i lus r ated in A nnex D, Fig ur e D.7)

5.11.2.3.3 S mple val ve o an e x ter nal lne thr ough which pr od ct in s orag e is circulated (i us r ated

in A nnex D, Fig ur e D.8)

5.11.3 Proc edure

5.11.3.1 Incremental samples from solutions, slur ries or suspensio s in storag e ves els of

capacity not les than 1 000 l (1 m

3

)

5.11.3.1.1 S mplng at so r c e

If the fe ti z r is being with rawn from a tank an the e is a ta of adeq at e dimensions in the outlet

pipe, draw inc emental samples from the ta (aft er firs with rawing twic the v lume in the pipe t o

r mo e any r sid es in the pipe) int o a clean dry ves el at ran om time int erv ls

5.11.3.1.2 Homog eneo s fluids

Draw a out 1 l of fluid from a convenient outlet in the tan (aft er firs with rawing twic the v lume in

the pipe t o r mo e any r sid es in the outlet) int o a clean dry ves el

5.11.3.1.3 Heterog eneo s fluids

If it is p s ible for it t o be homog eniz d, mix the fluid, e.g as desc ibed in Annex E, then take a sample in

ac ordanc with 5.1 3.1.2 or from a convenient outlet in a r cir ulation pipe

If it is not p s ible t o make the lq id homog eneous or if it is conside ed that the proc d r s in 5.1 3.1.1

an 5.1 3.1.2 ar not a pro riat e, sample the cont ent b lowe ing an o en tube of suita le dimensions

(long enough t o r ach the b tt om) ( e 5.1 2.2.1) ve ticaly int o the tan Then close one or b th en s

of the tube and trans e it cont ent int o a clean dry ves el If samplng b tube is impractica le, take

inc emental samples from v rious levels of the tan with a samplng b t le so as t o o tain an a gr g t e

sample r pr sentative of the lot ( e Figur 7) R epeat the o e ation u ti a q antity of at leas 1 l has

be n with rawn If the tank has a non-u iform c os se tion then take seve al p rtions, as ne es ary,

of each inc emental sample at v rious depths and combine them in a ratio r fle ting the v riations in

c os -se tional ar a The t otal amount taken shal not be les than 1 l

Key

a sample point

b distance fr om surface

c proportional volume

Figure 7 Ty ical samplng s heme for a ful cylindrical tank an a part ialy fi led elipt ical tank

5.11.3.2 S mpled portio c onsisting of two or mor e c ontainer s

Take inc ement from each, proc eding in the man e desc ibed in 5.1 3.1.1, 5.1 3.1.2or 5.1 3.1.3 as

a pro riat e

5.11.3.3 Solutio s or suspensio s in storag e ves els of capacity les than 1 0 0 l

5.11.3.3.1 The numbe of ves els from which the incr ement are to be taken should be sele ted in

ac or danc with 4.2.1.2 an tr eated as desc ibed in 4.2.2.2