ISO 937:2023

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

This document specifies a reference method for the determination of the nitrogen content of meat and meat products by the Kjeldahl principle.

Viandes et produits à base de viande — Détermination de la teneur en azote — Méthode de référence

Meso in mesni proizvodi - Določanje vsebnosti dušika (referenčna metoda) (ISO 937:2023)

General Information

• Status: Published
• Publication Date: 27-Aug-2023
• ICS: 67.120.10 - Meat and meat products
• Technical Committee: ISO/TC 34/SC 6 - Meat, poultry, fish, eggs and their products
• Drafting Committee: ISO/TC 34/SC 6 - Meat, poultry, fish, eggs and their products
• Current Stage: 6060 - International Standard published
• Start Date: 28-Aug-2023
• Due Date: 08-Jun-2024
• Completion Date: 28-Aug-2023
• Ref Project: SIST ISO 937:2024 - Meat and meat products — Determination of nitrogen content — Reference method (ISO 937:2023)

Relations

• Revises: ISO 937:1978 - Meat and meat products — Determination of nitrogen content (Reference method)
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 937
Second edition
2023-08
Meat and meat products —
Determination of nitrogen content —
Reference method
Viandes et produits à base de viande — Détermination de la teneur en
azote — Méthode de référence
Reference number
ISO 937:2023(E)
© ISO 2023

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ISO 937:2023(E)
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© ISO 2023
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Published in Switzerland
ii
  © ISO 2023 – All rights reserved

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ISO 937:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Sampling . 1
6 Preparation of test sample . 2
7 Reagents and materials . 2
8 Apparatus . 3
9 Procedure .4
9.1 Test portion . 4
9.2 Determination . 4
9.2.1 Traditional Kjeldahl apparatus . 4
9.2.2 Automatic Kjeldahl meter. 5
9.3 Blank test . 5
9.4 Recovery test . 5
10 Expression of results . 6
11 Precision . 6
12 Notes on procedure .
...