SIST EN ISO 712:2010
Cereals and cereal products - Determination of moisture content - Reference method (ISO 712:2009)
Cereals and cereal products - Determination of moisture content - Reference method (ISO 712:2009)
This International Standard specifies a routine reference method for the determination of the moisture content of cereals and cereal products. This International Standard applies to: wheat, rice (paddy, husked and milled), barley, millet (Panicum miliaceum), rye, oats, triticale, sorghum in the form of grains, milled grains, semolina or flour. The method is not applicable to maize and pulses.
Getreide und Getreideerzeugnisse - Bestimmung des Feuchtegehaltes - Referenzverfahren (ISO 712:2009)
Diese Internationale Norm legt ein Routine-Referenzverfahren zur Bestimmung des Feuchtegehaltes von
Getreide und Getreideerzeugnissen fest.
Diese Internationale Norm gilt für Weizen, Reis (ungeschälter Reis, geschälter Reis und Weißreis), Gerste,
Rispenhirse (Panicum miliaceum), Roggen, Hafer, Triticale, Mohrenhirse in Form von Körnern, zerkleinerten
Körnern, Grieß oder Mehl.
Das Verfahren ist nicht anwendbar auf Mais und Hülsenfrüchte.
ANMERKUNG Bestimmung des Feuchtegehaltes in Mais siehe ISO 6540 [5] und in Hülsenfrüchte siehe ISO 24557 [7].
Céréales et produits céréaliers - Détermination de la teneur en eau - Méthode de référence (ISO 712:2009)
L'ISO 712:2009 spécifie une méthode de référence pratique pour la détermination de la teneur en eau des céréales et des produits céréaliers.
L'ISO 712:2009 est applicable aux produits suivants: blé, riz (paddy, décortiqué et usiné), orge, millet (Panicum miliaceum), seigle, avoine, triticale, sorgho, à l'état de grains, grains broyés, semoule ou farine.
La méthode n'est applicable ni au maïs ni aux légumineuses.
Žito in proizvodi iz žita - Določevanje vsebnosti vlage - Referenčna metoda (ISO 712:2009)
Ta mednarodni standard določa rutinsko referenčno metodo za določevanje vsebnosti vlage v žitu in proizvodih iz žita. Ta mednarodni standard velja za: pšenico, riž (neoluščeni, oluščeni in brušeni), ječmen, proso (Panicum miliaceum), rž, oves, tritikalo, sirek v obliki zrn, mletih zrn, zdroba ali moke. Metoda ne velja za koruzo in zrna stročnic.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2010
äLWRLQSURL]YRGLL]åLWD'RORþHYDQMHYVHEQRVWLYODJH5HIHUHQþQDPHWRGD ,62
Cereals and cereal products - Determination of moisture content - Reference method
(ISO 712:2009)
Getreide und Getreideerzeugnisse - Bestimmung des Feuchtegehaltes -
Referenzverfahren (ISO 712:2009)
Céréales et produits céréaliers - Détermination de la teneur en eau - Méthode de
référence (ISO 712:2009)
Ta slovenski standard je istoveten z: EN ISO 712:2009
ICS:
67.060 äLWDVWURþQLFHLQSURL]YRGLL] Cereals, pulses and derived
QMLK products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 712
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2009
ICS 67.060
English Version
Cereals and cereal products - Determination of moisture content
- Reference method (ISO 712:2009)
Céréales et produits céréaliers - Détermination de la teneur Getreide und Getreideerzeugnisse - Bestimmung des
en eau - Méthode de référence (ISO 712:2009) Feuchtegehaltes - Referenzverfahren (ISO 712:2009)
This European Standard was approved by CEN on 14 November 2009.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 712:2009: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
This document (EN ISO 712:2009) has been prepared by Technical Committee ISO/TC 34 "Food products" 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 May 2010, and conflicting national standards shall be withdrawn at the
latest by May 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 712:2009 has been approved by CEN as a EN ISO 712:2009 without any modification.
INTERNATIONAL ISO
STANDARD 712
Fourth edition
2009-11-15
Cereals and cereal products —
Determination of moisture content —
Reference method
Céréales et produits céréaliers — Détermination de la teneur en eau —
Méthode de référence
Reference number
ISO 712:2009(E)
©
ISO 2009
ISO 712:2009(E)
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ii © ISO 2009 – All rights reserved
ISO 712:2009(E)
Contents Page
Foreword .iv
1 Scope.1
2 Terms and definitions .1
3 Principle.1
4 Apparatus.1
5 Sampling.2
6 Preparation of the test sample.2
6.1 Products not requiring grinding .2
6.2 Products requiring grinding.3
6.2.1 General .3
6.2.2 Grinding without preconditioning .3
6.2.3 Grinding with preconditioning .3
7 Procedure.3
7.1 Number of determinations.3
7.2 Test portion.3
7.3 Drying .4
7.4 Weighing.4
8 Expression of results.4
8.1 Without preconditioning.4
8.2 With preconditioning.4
9 Precision.5
9.1 Interlaboratory test.5
9.2 Repeatability .5
9.3 Reproducibility .5
9.4 Comparison of two groups of measurements in one laboratory .5
9.5 Comparison of two groups of measurements in two laboratories.6
9.6 Uncertainty.6
10 Test report.6
Annex A (informative) Results of interlaboratory test .7
Annex B (informative) Cereals and cereal products — Determination of moisture content
Absolute method .9
Bibliography.16
ISO 712:2009(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 712 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 4, Cereals and
pulses.
This fourth edition cancels and replaces the third edition (ISO 712:1998), which has been technically revised.
iv © ISO 2009 – All rights reserved
INTERNATIONAL STANDARD ISO 712:2009(E)
Cereals and cereal products — Determination of moisture
content — Reference method
1 Scope
This International Standard specifies a routine reference method for the determination of the moisture content
of cereals and cereal products.
This International Standard applies to: wheat, rice (paddy, husked and milled), barley, millet (Panicum
miliaceum), rye, oats, triticale, sorghum in the form of grains, milled grains, semolina or flour.
The method is not applicable to maize and pulses.
[5] [7]
NOTE For moisture content determination in maize, see ISO 6540 ; and for pulses, see ISO 24557 .
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
moisture content
mass loss undergone by a product under the conditions specified in this International Standard
NOTE Moisture content is expressed as a percentage.
3 Principle
If necessary, a laboratory sample is ground, after conditioning, if required. A test portion is dried at a
temperature between 130 °C and 133 °C, under conditions which enable a result to be obtained which
corresponds to that obtained by the absolute method described in Annex B.
4 Apparatus
4.1 Analytical balance, capable of weighing to an accuracy of ± 0,001 g.
4.2 Grinding mill, having the following characteristics:
a) made of material which does not absorb moisture;
b) easy to clean and having as little dead space as possible;
c) enabling grinding to be carried out rapidly and uniformly, without appreciable development of heat
(difference of temperatures before and after grinding smaller than or equal to 5 °C);
NOTE A grinding mill fitted with a cooling device can comply with this requirement.
d) tightness to air to avoid water exchange between sample and external air;
e) adjustable so as to obtain particles of the d
...
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