NBN EN ISO 2871-2-1995 表面活性剂．洗涤剂．阳离子活性物含量测定．第2部分：低分子团（200-500）的阳离子活性物质（ISO 2871-2-1990）
Surface active agents - Detergents - Determination of cationic-active matter content - Part 2 : Cationic- active matter of low molecular mass (between 200 and 500) (ISO 2871-2:1990)