| VISOCOLOR® Sulphide |
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Determination of sulphide
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N,N-Dimethyl-1,4-phenylene diamine reacts with hydrogen sulphide to form an unstable compound which rearranges to leucomethylene blue. Oxidation with iron(III) ions yields methylene blue.
Thiocyanate and nitrite above 5 mg/l cause low results.
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| Data and ordering information |
| Cat. No. |
914 233 |
| Type |
refill pack |
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Range
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0.05 0.1 0.2 0.4 0.7 1.0 mg/l S2–
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| Sufficient for |
90 determinations |
| Shelf life |
at least 3 years |
| Sea water suitability |
yes
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| Detectable with PF-11 |
yes |
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In water sulphides can be present as dissolved hydrogen sulphide or as hydrosulphide or sulphide ions.
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