Photometric determination with diphenyl-carbazide Reaction basis according to DIN 38 405-D24 In acidic medium, chromate ions react with diphenylcarbazide (lyophilised in the tube test) to form a red-violet coloured complex. Chromium(III) ions are not determined unless they are converted to Cr(VI) by silver-catalysed oxidation with ammonium peroxodisulfate / sulfuric acid.
- Reference Code: 985024
- Type: 0.1 - 4.0 mg/L CrO42- 0.05 - 2.00 mg/L Cr(VI) when using semi-micro cuvettes 50 mm (REF 919 50): 0.01 - 1.00 mg/L CrO42- 0.005 - 0.500 mg/L Cr(VI)
- Sufficient for: 20 determinations
- Shelf life: at least 2 years
- Sea water suitability: