EPA Method 9253

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EPA Method 9253:
CHLORIDE (TITRIMETRIC, SILVER NITRATE)

Summary:
Water adjusted to pH 8.3 is titrated with silver nitrate solution in the presence of potassium chromate indicator. The end point is indicated by persistence of the orange-silver chromate color.

Scope:
This method is intended primarily for oxygen bomb combustates or other waters where the chloride content is 5 mg/L or more and where interferences such as color or high concentrations of heavy metal ions render Method 9252 impracticable.

Report Number:
SW-846 Ch 5