ISO 6736:1982Withdrawn

Dried milk — Determination of nitrate and nitrite contents — Method by cadmium reduction and photometry

Lait sec — Détermination des teneurs en nitrates et en nitrites — Méthode par réduction au cadmium et photométrie

Abstract / scope

Describes a method suitable for whole, partly skimmed and skimmed milk powder. The principle of determination consists in dissolving the dried milk in water, precipitating the fat and proteins, filtering and reducing the nitrate to nitrite in a portion of the filtrate by means of copperized cadmium. The sampling shall be made as specified in ISO 707. The apparatus for nitrate reduction is shown in a figure.

Life cycle

Replaced by

ISO 14673-1:2001WithdrawnMilk and milk products — Determination of nitrate and nitrite contents — Part 1: Method using cadmium reduction and spectrometryInternational Standard · Published 1 Nov 2001 · ISO/TC 34/SC 5 ISO 14673-2:2001WithdrawnMilk and milk products — Determination of nitrate and nitrite contents — Part 2: Method using segmented flow analysis (Routine method)International Standard · Published 1 Nov 2001 · ISO/TC 34/SC 5 ISO 14673-3:2001WithdrawnMilk and milk products — Determination of nitrate and nitrite contents — Part 3: Method using cadmium reduction and flow injection analysis with in-line dialysis (Routine method)International Standard · Published 1 Nov 2001 · ISO/TC 34/SC 5