CHEMetrics K-9503 Sulfide - Vacu-Vials Instrumental Kit (Methylene Blue Method)

Vial instrument kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules, Activator Solution, 25 mL sample cup, ampoule blank, and instructions.

This methylene blue test for sulfide kit requires the use of a CHEMetrics Direct-Readout Photometer or a spectrophotometer capable of accepting a 13 mm diameter round cell. Instrument sold separately.

Applications and Industries

Groundwater, wastewater, industrial process waters.

References

APHA Standard Methods, 23rd ed., Method 4500-S2 - D - 2000 EPA Methods for Chemical Analysis of Water and Wastes, Method 376.2 (1983).

Chemistry

In an acidic solution, sulfide reacts with N,N-dimethyl-pphenylenediamine and ferric chloride to produce methylene blue. The resulting blue color is directly proportional to the sulfide concentration. Results are expressed in ppm (mg/L) sulfide as S.

Storage Requirements

Products should be stored in the dark and at room temperature.

Analyte-Specific Information

Sulfide is not stable in aqueous solutions, particularly at pHs below 7. Samples should be analyzed immediately after collection and agitation of the sample should be minimized.

Kit includes:

• 30 ampoules
• Activator Solution
• 25 mL sample cup
• Ampoule blank
• Instructions