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EN ISO 5764:2009

Current

Current

The latest, up-to-date edition.

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

Published date

01-05-2009

Foreword
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Calibration of the thermistor cryoscope
9 Preparation of test sample
   9.1 Preparation
   9.2 Sample condition
10 Procedure
   10.1 Preliminary checks
   10.2 Routine calibration check
   10.3 Determination
11 Calculation and expression of results
   11.1 Calculation
   11.2 Expression of results
12 Precision
   12.1 Interlaboratory test
   12.2 Repeatability
   12.3 Reproducibility
13 Test report
Annex A (informative) - Interlaboratory trial on bovine
        milk
Annex B (informative) - Interlaboratory trial on raw
        ovine and caprine milk
Annex C (informative) - Guidelines for the application
        of routine thermistor cryoscope methods
Annex D (informative) - Adjustment of the freezing point
        value used as the reference for genuine milk
Bibliography

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.

Committee
CEN/TC 302
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Current

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ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions
ISO 6091:2010 Dried milk — Determination of titratable acidity (Reference method)
ISO 707:2008 Milk and milk products — Guidance on sampling
ISO 1042:1998 Laboratory glassware One-mark volumetric flasks
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 3696:1987 Water for analytical laboratory use — Specification and test methods

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