EN ISO 5764:2009

Milk - Determination of freezing point - Thermistor cryoscope method (Reference method) (ISO 5764:2009)

ISO 5764|IDF 108:2009 specifies a reference method for the determination of the freezing point of raw bovine milk, heat-treated whole, reduced fat and skimmed bovine milk, as well as raw ovine and caprine milk, by using a thermistor cryoscope.
The freezing point can be used to estimate the proportion of extraneous water in milk. Calculation of the amount of extraneous water is subject to daily and seasonal variations, and is not within the scope of ISO 5764|IDF 108:2009.
Results obtained from samples with a titratable acidity exceeding 20 ml of 0,1 mol/l sodium hydroxide solution per 10 g of non-fat solids are not representative of the original milk.

Milch - Bestimmung des Gefrierpunktes - Thermistor-Kryoskop-Verfahren (Referenzverfahren) (ISO 5764:2009)

Diese Internationale Norm legt ein Referenzverfahren zur Bestimmung des Gefrierpunktes von roher Vollmilch,
hitzebehandelter Vollmilch, teilentrahmter und entrahmter Milch (Magermilch) sowie roher Schaf- und
Ziegenmilch mit einem Thermistor-Kryoskop fest.
Der Gefrierpunkt kann zur Abschätzung des Anteils von Fremdwasser in Milch verwendet werden. Die Berechnung
der Menge von Fremdwasser hängt von täglichen und saisonalen Schwankungen ab und liegt nicht
innerhalb des Anwendungsbereichs dieser Internationalen Norm.
Ergebnisse von Untersuchungsproben, deren titrierbare Acidität über 20 ml an 0,1 mol/l Natriumhydroxidlösung
je 10 g fettfreier Trockenmasse beträgt, sind für die Milch im Originalzustand als nicht repräsentativ
anzusehen.
ANMERKUNG 1 Sterilisation und Pasteurisierung im Vakuum können den Gefrierpunkt von Milch beeinflussen
(siehe [5]).
ANMERKUNG 2 Das Verfahren beinhaltet die Anwendung von plateau-zeitgesteuerten Messgeräten. Für Routinemessungen
können auch andere Thermistor-Kryoskop-Verfahren, d. h. Festzeit-Verfahren, angewendet werden. Ein Leitfaden
für die Anwendung anderer Verfahren ist in Anhang C angegeben.
ANMERKUNG 3 Die in Abschnitt 1 und 9.2 genannten Grenzwerte für die titrierbare Acidität beziehen sich auf Kuhmilch.
Es ist möglich, dass die Grenzwerte bei Schaf- und Ziegenmilch höher sind.

Lait - Détermination du point de congélation - Méthode au cryoscope à thermistance (Méthode de référence) (ISO 5764:2009)

L'ISO 5764|FIL 108:2009 spécifie une méthode de référence pour la détermination du point de congélation du lait entier cru de bovin, traité thermiquement, à matière grasse réduite, et du lait écrémé de bovin ainsi que du lait cru de brebis et de chèvre, utilisant un cryoscope à thermistance.
Le point de congélation peut être utilisé pour estimer la proportion d'eau étrangère dans le lait. Le calcul de la quantité d'eau étrangère est toutefois sujet à des variations journalières et saisonnières et ne fait pas partie du domaine d'application de l'ISO 5764|FIL 108:2009.
Les résultats obtenus à partir d'échantillons ayant une acidité supérieure à 20 ml d'une solution d'hydroxyde de sodium à 0,1 mol/l pour 10 g de solides non gras ne sont pas représentatifs du lait d'origine.

Mleko - Določevanje ledišča - Metoda Thermistor cryoscope (referenčna metoda) (ISO 5764:2009)

General Information

• Status: Published
• Publication Date: 30-Apr-2009
• Withdrawal Date: 29-Nov-2009
• ICS: 67.100.10 - Milk and processed milk products
• Technical Committee: CEN/TC 302 - Milk and milk products - Methods of sampling and analysis
• Drafting Committee: CEN/TC 302 - Milk and milk products - Methods of sampling and analysis
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 01-May-2009
• Completion Date: 01-May-2009
• Ref Project: SIST EN ISO 5764:2009 - Milk - Determination of freezing point - Thermistor cryoscope method (Reference method) (ISO 5764:2009)

Relations

• Replaces: EN ISO 5764:2002 - Milk - Determination of freezing point - Thermistor cryoscope method (Reference method) (ISO 5764:2002)
• Effective Date: 13-May-2009

Standards Content (Sample)

SLOVENSKI STANDARD
1DGRPHãþD
SIST EN ISO 5764:2002
0OHNR'RORþHYDQMHOHGLãþD0HWRGD7KHUPLVWRUFU\RVFRSHUHIHUHQþQDPHWRGD
,62
Milk - Determination of freezing point - Thermistor cryoscope method (Reference
method) (ISO 5764:2009)
Milch - Bestimmung des Gefrierpunktes - Thermistor-Kryoskop-Verfahren
(Referenzverfahren) (ISO 5764:2009)
Lait - Détermination du point de congélation - Méthode au cryoscope à thermistance
(Méthode de référence) (ISO 5764:2009)
Ta slovenski standard je istoveten z: EN ISO 5764:2009
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 2009
ICS 67.100.10 Supersedes EN ISO 5764:2002
English Version
Milk - Determination of freezing point - Thermistor cryoscope
method (Reference method) (ISO 5764:2009)
Lait - Détermination du point de congélation - Méthode au Milch - Bestimmung des Gefrierpunktes - Thermistor-
cryoscope à thermistance (Méthode de référence) (ISO Kryoskop-Verfahren (Referenzverfahren) (ISO 5764:2009)
5764:2009)
This European Standard was approved by CEN on 13 April 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 5764:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 5764:2009) 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 2009, and conflicting national standards shall be withdrawn
at the latest by November 2009.
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.
This document supersedes EN ISO 5764:2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, 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 5764:2009 has been approved by CEN as a EN ISO 5764:2009 without any modification.

INTERNATIONAL ISO
STANDARD 5764
IDF
Third edition
2009-05-01
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 5764:2009(E)
IDF 108:2009(E)
©
ISO and IDF 2009
ISO 5764:2009(E)
IDF 108:2009(E)
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ii © ISO and IDF 2009 – All rights reserved

ISO 5764:2009(E)
IDF 108:2009(E)
Contents Page
Foreword. iv
Foreword. v
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Principle.2
5 Reagents.2
6 Apparatus .3
7 Sampling.4
8 Calibration of the thermistor cryoscope .4
9 Preparation of test sample.5
9.1 Preparation .5
9.2 Sample condition.6
10 Procedure .6
10.1 Preliminary checks .6
10.2 Routine calibration check .6
10.3 Determination.6
11 Calculation and expression of results.7
11.1 Calculation.7
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 .8
Annex A (informative) Interlaboratory trial on bovine milk.9
Annex B (informative) Interlaboratory trial on raw ovine and caprine milk .11
Annex C (informative) Guidelines for the application of routine thermistor cryoscope methods .13
Annex D (informative) Adjustment of the freezing point value used as the reference for genuine
milk.16
Bibliography .17

ISO 5764:2009(E)
IDF 108:2009(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.
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). It is being published
jointly by ISO and IDF.
This third edition of ISO 5764⎪IDF 108 cancels and replaces the second edition (ISO 5764⎪IDF 108:2002), the
scope of which has been technically revised.

iv © ISO and IDF 2009 – All rights reserved

ISO 5764:2009(E)
IDF 108:2009(E)
Foreword
IDF (the International Dairy Federation) is a non-profit organization representing the dairy sector worldwide.
IDF membership comprises National Committees in every member country as well as regional dairy
associations having signed a formal agreement on cooperation with IDF. All members of IDF have the right to
be represented on the IDF Standing Committees carrying out the technical work. IDF collaborates with ISO 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
the IDF National Committees casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. IDF 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). It is being published
jointly by ISO and IDF.
All work was carried out by the Joint IDF-ISO Acti
...