NEN EN ISO 660 : 2009

National foreword
1 Scope
2 Normative references
3 Definitions
4 Hot ethanol method using indicator
5 Cold solvent method using indicator
6 Potentiometric method
7 Calculation
8 Precision
9 Test report
Annex A (informative) Results of interlaboratory tests
Annex B (informative) Bibliography
Annex ZA (normative) Normative references to international
                     publications with their relevant
                     European publications
Table 1 - Mass of test portion
Table 2 - Choice of fatty acid for expression of acidity

Defines three methods (two titrimetric and one potentiometric) for the determination of the acidity in animal and vegetable fats and oils, hereinafter referred to as fats.