Animal and vegetable fats and oils. Determination of peroxide value. Potentiometric end-point determination (ISO 27107:2008, corrected version 2009-05-15 )
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ISO 27107:2008 specifies a method for the potentiometric end-point determination of the peroxide value, in milliequivalents of active oxygen per kilogram, of animal and vegetable fats and oils. The method is applicable to all animal and vegetable fats and oils, fatty acids, and their mixtures, with peroxide values from 0 meq to 30 meq of active oxygen per kilogram. It is also applicable to margarines and fat spreads with varying water content. The method is not applicable to milk fats or lecithins.
Tämän julkaisun valmistelusta Suomessa vastaa SFS Suomen Standardit, puh. 09 149 9331.
Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of the test sample
9 Procedure
9.1 General
9.2 Preparation and titre determination of the 0,01 N sodium thiosulfate standard solution
9.3 Determination of peroxide value
10 Calculation and expression of results
11 Precision
11.1 Interlaboratory test
11.2 Repeatability
11.3 Reproducibility
12 Test report
Annex A Examples of potentiometric titration curves (informative)
Annex B Results of an interlaboratory test (informative)