| VISOCOLOR® ECO Chromium |
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Colorimetric determination of chromium (VI)
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In sulphuric acid chromate ions react with diphenylcarbazide to form a red-violet dye. (Reaction principle analogous to APHA 3500-Cr D & DIN EN ISO 18412)
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| Data and ordering information |
| Cat. No. |
931 020 (931 220) |
| Type |
colorimetric test kit (refill pack) |
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Range
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0.02 0.05 0.1 0.15 0.2 0.3 0.4 0.5 mg/l Cr(VI)
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| Sufficient for |
140 determinations |
| Shelf life |
at least 18 months |
| Sea water suitability |
yes
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| Detectable with PF-11 |
yes |
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Chromium compounds can be present in industrial waste waters in trivalent form [chromium(III) ions] and in hexavalent form (chromate and dichromate ions). In order to determine the total chromium all other valencies must be oxidised to chromium(VI).
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