Device for chloride ion removal prior to chemical oxygen demand

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

1995-09-25

1997-09-16

Soderquist, Arlen

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Sample mechanical transport means in or for automated...

422 79, 422101, 436 62, 436145, 436146, 436175, G01N 3318

Patent

active

056677545

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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