EN ISO 11052:2006

SLOVENSKI STANDARD
01-marec-2007
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,62
Durum wheat flour and semolina - Determination of yellow pigment content (ISO
11052:1994)
Hartweizenmehl und Hartweizengrieß - Bestimmung des Gehaltes an gelben Pigmenten
(ISO 11052:1994)
Farines et semoules de blé dur - Détermination de la teneur en pigments jaunes (ISO
11052:1994)
Ta slovenski standard je istoveten z: EN ISO 11052:2006
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 11052
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2006
ICS 67.060
English Version
Durum wheat flour and semolina - Determination of yellow
pigment content (ISO 11052:1994)
Farines et semoules de blé dur - Détermination de la teneur Hartweizenmehl und Hartweizengrieß - Bestimmung des
en pigments jaunes (ISO 11052:1994) Gehaltes an gelben Pigmenten (ISO 11052:1994)
This European Standard was approved by CEN on 3 August 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, 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.
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EUROPÄISCHES KOMITEE FÜR NORMUNG
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© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11052:2006: E
worldwide for CEN national Members.

Foreword
The text of ISO 11052:1994 has been prepared by Technical Committee ISO/TC 34 "Agricultural
food products” of the International Organization for Standardization (ISO) and has been taken
over as EN ISO 11052:2006 by 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 February 2007, and conflicting national
standards shall be withdrawn at the latest by February 2007.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
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.

Endorsement notice
The text of ISO 11052:1994 has been approved by CEN as EN ISO 11052:2006 without any
modifications.
INTERNATIONAL IS0
STANDARD 11052
First edition
1994-09-01
Durum wheat flour and semolina -
Determination of yellow pigment content
Farines et semoules de b/6 dur - D&termination de la teneur en pigments
jaunes
Reference number
IS0 I 1052: 1994(E)
IS0 11052:1994(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
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.
International Standard IS0 11052 was prepared by Technical Committee
ISODC 34, Agricultural food products, Subcommittee SC 4, Cereals and
pulses.
Annexes A and B of this International Standard are for information only.
.
0 IS0 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardizati0.n
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
IS0 11052:1994(E)
INTERNATIONAL STANDARD 0 IS0
Durum wheat flour and semolina - Determination of
yellow pigment content
evaluation of the optical density of the clear filtrate
1 Scope
against B-carotene standard solutions.
This International Standard specifies a method for
determination of the yellow pigment content in durum
5 Reagents
wheat flour and semolina (Triticum durum L.).
Use only reagents of recognized analytical grade and
distilled or demineralized water or water of at least
2 Normative reference
equivalent purity.
The following standard contains provisions which,
5.1 Water-saturated n-butanol
through reference in this text, constitute provisions
of this International Standard. At the time of publica-
Prepare a solution of n-butanol and water in pro-
tion, the edition indicated was valid. All standards are
portions 6:2 (V/V) and shake vigorously. Use the clear
subject to revision, and parties to agreements based
upper layer after separation of the phases.
on this International Standard are encouraged to in-
vestigate the possibility of applying the most recent
5.2 Diethyl ether
edition of the standard indicated below. Members of
IEC and IS0 maintain registers of currently valid
International Standards.
5.3 Synthetic P-carotene, crystalline, finely
crushed.
IS0 712: 1985, Cereals and cereal products - Deter-
mination of moisture content (Routine reference
6 Apparatus
method).
Usual laboratory apparatus and, in particular, the fol-
3 Definition
lowing.
For the purposes of this International Standard, the
6.1 Grinder, having the following properties:
following definition applies.
- constructed of a material that does not absorb
3.1 yellow pigment content: An essential quality
water;
factor of raw materials for the production of pasta,
defined as the content of extractable carotenoids of
- easy to clean;
the endosperm.
...