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This standard specifies the determination of water soluble chloride and sulphate of aqueous extracts of textile materials. This method has been written in response to an aerospace requirement for a method of extraction using hot water; this method should be used in conjunction with EN 4426. At DIN the committee responsible for this standard is NA 131-02-01 AA "Faserverstärkte Kunststoffe" ("Fibre-reinforced plastics").