DR/2400
Sulfate
Sulfate_AVPP_Other_SV4_Eng_Ody.fm Page 1 of 6
• You must adjust the standard curve for each new lot of reagent. See Standard Solutions following these steps.
• For best results, perform a new calibration for each lot of reagent. See Calibration Standard Preparation following these steps.
• For more accurate results, determine a reagent blank value for each new lot of reagent. Follow the procedure using deionized
water in place of the sample. Subtract the reagent blank value from the final results or perform a reagent blank adjust. See the
instrument manual for more information on Running a Reagent Blank.
• Filter highly colored or turbid samples using filter paper (Cat. No. 1894-57) and a funnel (Cat. No. 1083-67). Use this sample
in step 5.
• After adding reagent to the sample, a white turbidity will form if sulfate is present.
• Undissolved powder that has settled does not affect accuracy.
• SulfaVer
®
4 contains barium chloride. The final solution will contain barium chloride (D005) at a concentration regulated as a
hazardous waste by the Federal RCRA. See Section 4 for more information on proper disposal of these materials.
Sulfate
(Method 8051
SulfaVer 4 Method*
*Adapted from Standard Methods for the Examination of Water and Wastewater. Procedure is equivalent to USEPA method 375.4
for wastewater.
Powder Pillows or AccuVac
®
Ampuls
(2 to 70 mg/L)
Scope and Application: For water, wastewater, and seawater; USEPA accepted for reporting
wastewater analyses
1. Touch
Hach Programs.
Select program
680 Sulfate.
Touch
Start.
2. Fill a clean sample
cell with 10 mL of
sample.
3. Add the contents of
one SulfaVer 4 Reagent
Powder Pillow to the
sample cell (the prepared
sample). Swirl to mix.
4. Touch the timer icon.
Touch
OK.
A five-minute reaction
period will begin. Do not
disturb the cell during
this time.
Tips and Techniques
Powder Pillows Method 8051
Hach Programs
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