Sequential injection system with inline solid phase extraction

RESULTS AND DISCUSSION Determination of Zn2+ and Cu2+ in rain water and leachate samples collected from LSSC Determination of Cu2+ in CRM samples of waste and ground water... EUH-3 Envir[r]

Presented by Thuan Hoa Nguyen

Department of Chemistry, Faculty of Science and Technology, Thammasat University

Sequential injection system with in-line solid phase extraction and soil minicolumn for determination of zinc and copper

in soil leachates Justyna Paluch, Raquel B.R Mesquita, Víctor Cerdà, Joanna Kozaka, Marcin Wieczorek, Antóni O.S.S Rangel

I ntroduction

CD solution Healthy body

 The liver

 The kidneys

 The nervous system

 toxic to the cytologic and physiologic

industrial, urban, agricultural,

gardening, forestry

zinc copper Levels of can be tolerated without risk to health Copper and Zine up to 1.5 and 5 mg/liter

The effective monitoring of waters affected by soil leachates

3 Mass spectrometry (ICP-MS)

4 Neutron activation analysis (NAA)

4

at 482 nm

Experiment

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SIA - SPE method for copper and zinc determination

a) Off-line laboratory scale soil core (LSSC)

b) In-line soil mini-column (ILSM)

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Two types of soil were used:

 Forest soil in Northwest Portugal

 Agricultural soil in Northwest Portugal

acidified to pH ≈ 2 before determination

laboratory scale soil core

CD solution

The In-Line Soil Mini-columns (ILSM)

Two types of soil were used:

 Forest soil in Northwest Portugal

 Agricultural soil in Northwest Portugal

(h = 3 cm, d = 2 cm) with surface soil with about 3 g

acidified to pH ≈ 2 before determination

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CD solution

SIA - SPE method for copper and zinc determination

a) Off-line laboratory scale soil core (LSSC)

b) In-line soil mini-column (ILSM)

Buffer

Off-line laboratory scale soil core (LSSC)

The Chelex 100 chelating resin

( Zn2+)

RESULTS and

DISCUSSION

RESULTS AND DISCUSSION

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Bi parametric determination of zinc and copper

Calibration curves for Zn 2+

for the sum of Zn 2+ + Cu 2+

Calibration curves for Cu 2+

Concentration values for Zn 2+

for Cu 2+

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RESULTS AND DISCUSSION

RESULTS AND DISCUSSION

RESULTS AND DISCUSSION

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Interference assessment

% interference = absorbance for analyte (interfering ion) – absorbance for analyte

absorbance for analyte x 100

The developed SI-SPE method can be used for determination

of zinc and copper in rain water and soil leachate samples with

No significant interferences.

RESULTS AND DISCUSSION

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Accuracy assessment

 Both analytes can be determined with satisfactory accuracy

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RESULTS AND DISCUSSION

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Determination of Zn2+ and Cu 2+ in rain water and leachate samples collected from

LSSC Determination of Cu2+ in CRM samples of waste and ground water

RESULTS AND DISCUSSION

RESULTS AND DISCUSSION

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 Analytical Application of the As-Obtained CDs

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CONCLUSIONS

• Small amount of sample and reagent

• Low detection limits

RESULTS AND DISCUSSION