This International Standard specifies a method using diethyl ether extraction for the determination of the unsaponifiable matter content of animal and vegetable fats and oils. This method is not applicable to waxes and, moreover, gives approximate results with certain fats of high unsaponifiable matter content, for example with fats derived from marine animals. A method given in ISO 18609 may be used when climatic conditions, or regulations, do not permit the use of diethyl ether.
Tämän julkaisun valmistelusta Suomessa vastaa SFS Suomen Standardit, puh. 09 149 9331.
Sisällysluettelo
Foreword
1 Scope
2 Normative reference
3 Term and definition
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of test sample
9 Procedure
9.1 Test portion
9.2 Saponification
9.3 Extraction of unsaponifiable matter
9.4 Washing of ethereal extract
9.5 Evaporation of solvent
9.6 Drying the residue and determination
9.7 Number of determinations
9.8 Blank test
10 Expression of results
11 Precision
12 Test report
Annex A Results of interlaboratory tests (informative)