【国家标准】 表面活性剂生物降解度试验方法

This standard specifies a method for the determination of primary biodegradability of surfactants.
This standard is applicable to determining the biodegradability of anionic surfactants with sulphate or sulphonate group; surfactants characterized by single polyoxyethylen chain with ethylene oxide (EO) number ranging from 3 to 40,or those with multiple polyoxyethylene (di-,tri-,quad-) chains with total EO number ranging from 6 to 60; alkylpolyglycosides; cationic and amphoteric surfactants; fatty acid surfactants and surfactants capable of either producing rich foam or effectively reducing water surface tension.This standard is also applicable to determining the biodegradability of above surfactants in detergents.