DS DS/EN ISO 4047
DS DSEN SO 4047 1999-FEB-08 Leather - Determnaton of sulphated total ash and sulphated water-nsoluble ash
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This standard specifies a method for the determination of the sulphated total ash and the sulphated water-insoluble ash of leather. The method is applicable to all types of leather. The determination may be inaccurate by the extent to which the leather contains organo-metallic compounds, for example silicone.