This document 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. In this case, an agreement is to be reached between the parties concerned. Milk and milk products (or fat coming from milk and milk products) are excluded from the scope of this document.th edition 2017-02 Animal and vegetable fats and oils — Determination of insoluble impurities content Corps gras d’origines animale et végétale — Détermination de la teneur en impuretés insolubles Reference number ISO 663:2017(E) ？ ISO 2017 ISO 663:2017(E) COPYRIGHT PROTECTED DOCUMENT ？ ISO 2017, Published in Switzerland All rights reserved. Unless o