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8.59. SURFACTANTS, ANIONIC
SPECIFICATIONS
Range 0.00 to 3.50 mg/L (as SDBS)
Resolution 0.01 mg/L
Accuracy ±0.04 mg/L ±3% of reading at 25 °C
Light Source LED with narrow band interference filter @ 610 nm
Method Adaptation of the USEPA method 425.1 and Standard Methods for the
Examination of Water and Wastewater, 20th edition, 5540C, Anionic
Surfactants as MBAS.
REQUIRED REAGENTS
Code Description Quantity
HI95769A‑0 Anionic Surfactants Reagent A 4 drops
HI95769B‑0 Anionic Surfactants Reagent B 2 drops
‑ Chloroform Reagent 10 mL
DEIONIZED120 Deionizate Water 15 mL
REAGENT SETS
HI95769‑01 Reagents for 40 tests
For other accessories see page 200.
MEASUREMENT PROCEDURE
• Select the Surfactants (Anionic) method using the procedure described in
the Method Selection section (see page 18).
• Fill the graduated glass vial with 25 mL of sample.
Note: For improved accuracy the use of class A laboratory
pipettes is recommended.
• Add 2 drops of HI95769A‑0 Anionic Surfactants Reagent A and 2 drops
of HI95769B‑0 Anionic Surfactants Reagent B.
• Close vial with its cap and invert to mix, the solution will turn blue.
• Add 10 mL of Chloroform.
SURFACTANTS, ANIONIC
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