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
Current Stage
6060 - International Standard published
Start Date
28-Aug-2023
Due Date
08-Jun-2024
Completion Date
28-Aug-2023

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ISO 937:2023 - Meat and meat products — Determination of nitrogen content — Reference method Released:28. 08. 2023
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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)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
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 .
...

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