DR/2400
Sulfide
Sulfide_None_Other_MLB_Eng_Ody.fm Page 1 of 4
• Analyze samples immediately. Do not preserve for later analysis.
• Avoid excessive agitation of samples to minimize sulfide loss.
• Some sulfide loss may occur if dilution is necessary.
• Wipe the outside of sample cells before each insertion into the instrument cell holder. Use a damp towel followed by a dry one to
remove fingerprints or other marks.
• Sulfide 2 reagent contains potassium dichromate. The final solution will contain hexavalent chromium (D007) at a
concentration regulated as a hazardous waste by Federal RCRA. Please see Section 4 for further information on proper disposal
of these materials.
Sulfide
(Method 8131
Methylene Blue Method*
*Adapted from Standard Methods for the Examination of Water and Wastewater.
(5 to 800 µg/L)
Scope and Application: For testing total sulfides, H
2
S, HS
–
, and certain metal sulfides in groundwater,
wastewater brines, and seawater; USEPA Approved for reporting wastewater analysis**
** Procedure is equivalent to USEPA method 376.2 and Standard Method 4500-S
2–
D for wastewater.
1. Touch
Hach Programs.
Select program
690 Sulfide.
Touch
OK.
2. Avoiding excess
agitation of the sample,
use a pipet add 25 mL of
sample to a sample cell
(the prepared sample).
3. Measure 25 mL of
deionized water into a
second sample cell
(the blank).
4. Use the calibrated 1-
mL dropper to add
1.0 mL of Sulfide 1
Reagent to each cell.
Swirl to mix.
Tips and Techniques
10 mL
20 mL
25 mL
Method 8131
Hach Programs
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
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