EPA Method 9035

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EPA Method 9035:
SULFATE (COLORIMETRIC, AUTOMATED, CHLORANILATE)

Summary:
When solid barium chloranilate is added to a solution containing sulfate, barium sulfate is precipitated, releasing the highly colored acid chloranilate ion. The color intensity in the resulting chloranilic acid solution is proportional to the amount of sulfate present.

Scope:
This automated method is applicable to ground water, drinking and surface waters, and domestic and industrial wastes containing 10 to 400 mg SO4 /liter.

Report Number:
SW-846 Ch 5