ISO 6739:1988

Whey cheese — Determination of nitrate and nitrite contents — Method by cadmium reduction and spectrometry

Publication date: Aug 25, 1988

95.99 Withdrawal of Standard Nov 1, 2001

General information

Current stage: 95.99 Effective date: Nov 1, 2001

Originator: ISO

Owner: ISO/TC 34/SC 5

Type: International Standard

ICS: 67.100.30

Languages: French English

Buying

Status: Withdrawn

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Scope

Is suitable for all kinds of whey cheese. The principle of determination consists in extracting the whey cheese with warm water, precipitating the fat and proteins, filtering and reducing the nitrate in a portion of the filtrate to nitrite by means of copperized cadmium. The apparatus for nitrate reduction is shown in a figure.