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| NANOCOLOR® Chromate 5 |
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| Photometric determination of chromate |
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Photometric determination with diphenyl-carbazide
In acidic medium, chromate ions react with diphenylcarbazide (lyophilised in the tube test) to form a red-violet colour complex.
Chromium(III) ions are not determined unless they are converted to Cr(VI) by silver-catalysed oxidation with ammonium peroxodisulphate-/sulphuric acid.
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| Data and ordering information |
| Cat. No. |
985 024 |
| Type |
tube test 0-24 |
| Range |
0.1 – 4.0 mg/l CrO42–
0.05 – 2.00 mg/l Cr(VI)
when using semi-micro cuvettes 50 mm
(Cat. No. 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 |
yes |
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