VISOCOLOR® ECO SulphidePrinciple:Colorimetry with colour comparison card
• visual and photometric evaluation (with PF-11 / photino)
• environment-friendly, without toxic reagents
• economically priced
• convenient handling
• higher accuracy and sensitivity
• with pictographic instructions
• reagent bottles with clear dosing instructions
• compensation of turbidities and colours
• refill packs available
Colorimetric determination of Sulphide
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.
(Reaction principle analogous to APHA 4500-S2-, DIN 38405-D26/27)
| Data and ordering information | |
| Cat. No. | 931 094 (931 294) |
| Type | colorimetric test kit (refill pack) |
| Range | 0.1 · 0.2 · 0.3 · 0.4 · 0.5 · 0.6 · 0.7 · 0.8mg/l S2– |
| Sufficient for | 90 determinations |
| Shelf life | at least 36 months |
| Sea water suitability | yes |
| Detectable with PF-11 | yes |
In water sulphides can be present as dissolved hydrogen sulphide or as hydrosulphide or sulphide ions.
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