ANALYTICAL TEST METHOD IRON OXIDES ATM: 35 WATER SOLUBLE ISSUE: 3 PREPARED BY: M.. USHER PAGE 1 OF 1 Univar Ltd International House, Zenith, Paycocke Road, Basildon, Essex, SS14 3DW,
Trang 1ANALYTICAL TEST METHOD IRON OXIDES ATM: 35
WATER SOLUBLE ISSUE: 3
PREPARED BY: M DOWNING APPROVED BY: A USHER PAGE 1 OF 1
Univar Ltd International House, Zenith, Paycocke Road, Basildon, Essex, SS14 3DW, England
Registered in England No 139876 Tel +44 (0) 1268 594400 Fax +44 (0) 1268 594481
SAFETY: Follow normal laboratory approved code of practice for safety
Wear eye protection in the Analytical Laboratory
EQUIPMENT: 250ml Pyrex Evaporating Basin
Steam Bath Pyrex Filter Funnel (fluted) 150mm GF/D (or GF/F) Whatman Glass Microfibre Filter Paper
METHOD: Dry a 250ml evaporating dish in an oven at 105°C for 30 minutes
Allow to cool in a desiccator and weigh accurately to constant weight
Weigh accurately 3 to 5g of sample into a 250ml beaker Add 100ml
of deionised water and boil Allow to cool, filter through a Whatman GF/D (or GF/F microfibre if ultra-fine) filter paper into the
evaporating dish Evaporate to dryness on a steam bath and then dry in the oven at 105°C for 30 minutes Allow to cool in a desiccator and re-weigh to constant weight
CALCULATIONS: % water soluble matter = Weight Residue x 100
Weight sample