Maize - Determination of moisture content (on milled grains and on whole grains) (ISO 6540:2021)

This document specifies two methods:
- a reference method for the determination of the moisture content of maize grains and ground whole maize, groats, grits and maize flour, see Clause 4;
- a routine method for the evaluation of the moisture content of maize in whole grains, see Clause 5.
The latter is not suitable for use for experts' reports, or for calibration or checking of humidity meters, because of its significant bias to the reference method (see Table B.3).

Mais - Bestimmung des Feuchtegehalts (von gemahlenen und ganzen Körnern) (ISO 6540:2021)

Dieses Dokument legt zwei Verfahren fest:
- ein Referenzverfahren zur Bestimmung des Feuchtegehalts von ganzen Maiskörnern und gemahlenem Vollmais, Grobgrieß, Feingrieß und Maismehl, siehe Abschnitt 4;
- ein Routineverfahren zur Bewertung des Feuchtegehalts von ganzen Maiskörnern, siehe Abschnitt 5.
Das letztgenannte Verfahren ist wegen seiner signifikanten systematischen Abweichungskomponente gegenüber dem Referenzverfahren (siehe Tabelle B.3) nicht zur Anwendung für Fachberichte oder für die Kalibrierung oder Überprüfung von Feuchtemessgeräten geeignet.

Maïs - Détermination de la teneur en eau (sur grains broyés et sur grains entiers) (ISO 6540:2021)

Le présent document spécifie deux méthodes:
- une méthode de référence pour la détermination de la teneur en eau des grains de maïs et de la mouture de maïs entier, des gruaux et de la farine de maïs; voir l'Article 4;
- une méthode pratique pour l'évaluation de la teneur en eau des grains de maïs, en opérant sur les grains entiers; voir l'Article 5.
Cette dernière ne convient ni pour des expertises ni pour l'étalonnage ou le contrôle des humidimètres en raison de son biais important par rapport à la méthode de référence (voir le Tableau B.3).

Koruza - Določevanje vlage (v zmletih in celih zrnih) (ISO 6540:2021)

General Information

Status
Published
Publication Date
02-Mar-2021
Withdrawal Date
29-Sep-2021
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
03-Mar-2021
Completion Date
03-Mar-2021

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SLOVENSKI STANDARD
01-maj-2021
Nadomešča:
SIST EN ISO 6540:2010
Koruza - Določevanje vlage (v zmletih in celih zrnih) (ISO 6540:2021)
Maize - Determination of moisture content (on milled grains and on whole grains) (ISO
6540:2021)
Mais - Bestimmung des Feuchtegehalts (von gemahlenen und ganzen Körnern) (ISO
6540:2021)
Maïs - Détermination de la teneur en eau (sur grains broyés et sur grains entiers) (ISO
6540:2021)
Ta slovenski standard je istoveten z: EN ISO 6540:2021
ICS:
67.060 Žita, stročnice in proizvodi iz Cereals, pulses and derived
njih products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 6540
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2021
EUROPÄISCHE NORM
ICS 67.060 Supersedes EN ISO 6540:2010
English Version
Maize - Determination of moisture content (on milled
grains and on whole grains) (ISO 6540:2021)
Maïs - Détermination de la teneur en eau (sur grains Mais - Bestimmung des Feuchtegehalts (von
broyés et sur grains entiers) (ISO 6540:2021) gemahlenen und ganzen Körnern) (ISO 6540:2021)
This European Standard was approved by CEN on 13 February 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6540:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 6540:2021) has been prepared by Technical Committee CEN/TC 338 "NA" in
collaboration with Technical Committee CEN/TC 338 “Cereal and cereal products” the secretariat of
which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2021, and conflicting national standards
shall be withdrawn at the latest by September 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 6540:2010.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 6540:2021 has been approved by CEN as EN ISO 6540:2021 without any modification.

INTERNATIONAL ISO
STANDARD 6540
Second edition
2021-02
Maize — Determination of moisture
content (on milled grains and on
whole grains)
Maïs — Détermination de la teneur en eau (sur grains broyés et sur
grains entiers)
Reference number
ISO 6540:2021(E)
©
ISO 2021
ISO 6540:2021(E)
© ISO 2021
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
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 6540:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Reference method . 1
4.1 Principle . 1
4.2 Apparatus . 1
4.3 Sampling . 2
4.4 Preparation of the test sample . 2
4.4.1 Products not requiring to be ground . 2
4.4.2 Products requiring to be ground . 3
4.5 Procedure . 3
4.5.1 Number of determinations. 3
4.5.2 Test portion . 3
4.5.3 Drying . 4
4.5.4 Weighing . 4
4.6 Expression of results . 4
4.7 Precision . 5
4.7.1 Interlaboratory test . 5
4.7.2 Repeatability . 5
4.7.3 Reproducibility . 5
4.7.4 Comparison of two groups of measurements in a laboratory . 5
4.7.5 Comparison of two groups of measurements in two laboratories . 5
4.7.6 Uncertainty . 6
4.7.7 Comparison with the absolute method . 6
4.8 Notes on procedure . 6
4.9 Test report . 6
5 Routine method on whole grains . 7
5.1 Principle . 7
5.2 Apparatus . 8
5.3 Sampling . 8
5.4 Procedure . 8
5.4.1 Test portion . 8
5.4.2 Drying . 8
5.4.3 Number of determinations. 8
5.5 Expression of results . 9
5.5.1 Method of calculation and formulae . 9
5.5.2 Repeatability . 9
5.5.3 Reproducibility . 9
5.5.4 Comparison of two groups of measurements in a laboratory . 9
5.5.5 Comparison of two groups of measurements in two laboratories .10
5.5.6 Application of fidelity limits.10
5.6 Remark .10
5.7 Test report .10
Annex A (informative) Absolute method .11
Annex B (informative) Interlaboratory test results .18
Annex C (informative) Application of fidelity data for the whole grains method .24
Bibliography .
...

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