Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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This document was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 4, Cereals and pulses, in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 338, Cereal and cereal products, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This fifth edition cancels and replaces the fourth edition (ISO 2171:2007), which has been technically revised. The main changes are as follows:

— the Scope has been updated;
— silica gel has been added as a desiccant (5.2);
— the use of platinum dishes and a temperature of incineration of 900 °C for the flour analysis has replaced a choice of a temperature between 900 °C and 550 °C (see Table 1);
— the interlaboratory critical difference (C_D,R) has been updated in 11.4.2.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

BS EN ISO 2171:2023

Cereals, pulses and by-products. Determination of ash yield by incineration

Current

Published:

31 Mar 2023