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ISO 663:2007 Animal and vegetable fats and oils - Determination of insoluble impurities content
standard by International Organization for Standardization, 03/01/2007
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ISO 663:2007 specifies a method for the determination of the insoluble impurities content of animal and vegetable fats and oils.
If it is not desired to include soaps (particularly calcium soaps) or oxidized fatty acids in the insoluble impurities content, it is necessary to use a different solvent and procedure.