ISO 937:1978

Meat and meat products — Determination of nitrogen content (Reference method)

Publication date: Dec 1, 1978

General information

Current stage: 90.92 Effective date: Feb 26, 2021

Originator: ISO

Owner: ISO/TC 34/SC 6

Type: International Standard

ICS: 67.120.10

Languages: French English

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Status: Published

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Scope

The method consists in digesting of a test portion with concentrated sulphuric acid, using copper(II) sulphate as a catalyst, to convert organic nitrogen to ammonia ions. Then alkalisation, distillation of the liberated ammonia into an excess of boric acid solution, titration with hydrochloric acid to determine the ammonia bound by the boric acid, and calculation of nitrogen content of the sample from the amount of ammonia produced.

Life cycle

NOW

PUBLISHED
ISO 937:1978
90.92 Standard to be revised
Feb 26, 2021

REVISED BY

IN_DEVELOPMENT
ISO/DIS 937

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