Method for chloride ion removal prior to chemical oxygen demand

Details Method for chloride ion removal prior to chemical oxygen demand Method for chloride ion removal prior to chemical oxygen demand

1995-09-25

1997-11-04

Soderquist, Arlen

Chemistry: analytical and immunological testing

Including sample preparation

Digestion or removing interfering materials

210266, 210282, 422 79, 436 62, 436145, 436146, 436166, 433177, 433183, G01N 100, G01N 128, G01N 134

Patent

active

056839146

ABSTRACT:
A method of pretreating aqueous chemical oxygen demand (COD) samples to remove the risk of potential chloride ion interference. The method comprises acidifying an aqueous COD test sample, and thereafter passing the acidified sample through a source of pentavalent bismuth (Bi.sup.5+) such as sodium bismuthate.

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