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Analysis of formulated detergents - Quantitative test methods - Method for determination of inorganic sulphate content Ingestion-build-82396 The three classes of fitWhat is BS 3762 3. 22 Inorganic sulfates content of all types of commercial washing powders about? BS 3762 discusses the analysis of formulated detergents. BS 3762 3. 22 belongs to the BS 3762 multi series and discusses the determination of inorganic sulphate content. BS 3762 3. 22 specifies a gravimetric method for the determination of inorganic sulfates content of all types of commercial washing powders, without interference from other compounds