SIST EN ISO 5764:2002

SLOVENSKI STANDARD
01-september-2002
0OHNR'RORþHYDQMHOHGLãþD0HWRGD7KHUPLVWRUFU\RVFRSHUHIHUHQþQDPHWRGD
,62
Milk - Determination of freezing point - Thermistor cryoscope method (Reference
method) (ISO 5764:2002)
Milch - Bestimmung des Gefrierpunktes - Thermistor-Kryoskop-Verfahren
(Referenzverfahren) (ISO 5764:2002)
Lait - Détermination du point de congélation - Méthode au cryoscope a thermistance
(Méthode de référence) (ISO 5764:2002)
Ta slovenski standard je istoveten z: EN ISO 5764:2002
ICS:
67.100.10 0OHNRLQSUHGHODQLPOHþQL Milk and processed milk
SURL]YRGL products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 5764
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2002
ICS 67.100.10
English version
Milk - Determination of freezing point - Thermistor cryoscope
method (Reference method) (ISO 5764:2002)
Lait - Détermination du point de congélation - Méthode au Milch - Bestimmung des Gefrierpunktes - Thermistor-
cryoscope à thermistance (Méthode de référence) (ISO Kryoskop-Verfahren (Referenzverfahren) (ISO 5764:2002)
5764:2002)
This European Standard was approved by CEN on 4 May 2002.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5764:2002 E
worldwide for CEN national Members.

CORRECTED  2002-06-19
Foreword
This document (EN ISO 5764:2002) has been prepared by Technical Committee ISO/TC 34
"Agricultural food products" in collaboration with Technical Committee CEN/TC 302 "Milk and
milk products - Methods of sampling and analysis", the secretariat of which is held by NEN.
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 November 2002, and conflicting
national standards shall be withdrawn at the latest by November 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the
United Kingdom.
Endorsement notice
The text of the International Standard ISO 5764:2002 has been approved by CEN as a
European Standard without any modifications.
NOTE Normative references to International Standards are listed in annex ZA (normative).
prEN ISO 5764:2002 (E)
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions
of any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications,
indicated by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 1042 1998 Laboratory glassware — One mark EN ISO 1042 1999
volumetric flasks
ISO 3696 1987 Water for analytical laboratory EN ISO 3696 1995
use — Specification and test
methods
INTERNATIONAL ISO
STANDARD 5764
IDF
Second edition
2002-05-15
Milk — Determination of freezing point —
Thermistor cryoscope method (Reference
method)
Lait — Détermination du point de congélation — Méthode au cryoscope à
thermistance (Méthode de référence)

Reference numbers
ISO 5764:2002(E)
IDF 108:2002(E)
©
ISO and IDF 2002
ISO 5764:2002(E)
IDF 108:2002(E)
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ii © ISO and IDF 2002 – All rights reserved

ISO 5764:2002(E)
IDF 108:2002(E)
Contents Page
Foreword.iv
Introduction.vi
1 Scope .1
2 Normative references.1
3 Term and definition .1
4 Principle.1
5 Reagents.2
6 Apparatus .3
7 Sampling.5
8 Calibration of the thermistor cryoscope .5
9 Preparation of test sample.5
9.1 Preparation.5
9.2 Sample condition.5
10 Procedure .6
10.1 Preliminary checks.6
10.2 Routine calibration check.6
10.3 Determination.6
11 Calculation and expression of results.6
11.1 Calculation .6
11.2 Expression of results .7
12 Precision.7
12.1 Interlaboratory test.7
12.2 Repeatability .7
12.3 Reproducibility.7
13 Test report .7
Annex A (informative) Results of the interlaboratory test .8
Annex B (informative) Guidelines for the application of routine thermistor cryoscope methods .10
Annex C (informative) Adjustment of the freezing point value used as the reference for genuine milk .14
Bibliography.15

ISO 5764:2002(E)
IDF 108:2002(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 3.
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 International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 5764|IDF 108 was prepared by Technical Committee ISO/TC 34, Food products,
Subcommittee SC 5, Milk and milk products, and the International Dairy Federation (IDF), in collaboration with
AOAC International. It is being published jointly by ISO and IDF and separately by AOAC International.
This joint edition of ISO 5764|IDF 108 cancels and replaces the first edition of ISO 5764:1987, which has been
technically revised.
Annexes A to C of this International Standard are for information only.
iv © ISO and IDF 2002 – All rights reserved

ISO 5764:2002(E)
IDF 108:2002(E)
Foreword
IDF (the International Dairy Federation) is a worldwide federation of the dairy sector with a National Committee in
every member country. Every National Committee has the right to be represented on the IDF Standing Committees
carrying out the technical work. IDF collaborates with ISO and AOAC International in the development of standard
methods of analysis and sampling for milk and milk products.
Draft International Standards adopted by the Action Teams and Standing Committees are circulated to the National
Committees for voting. Publication as an International Standard requires approval by at least 50 % of National
Committees casting a vote.
International Standard ISO 5764|IDF 108 was prepared by Technical Committee ISO/TC 34, Food products,
Subcommittee SC 5, Milk and milk products, and the Internatio
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