DIN EN 12139:1999 表面活性剂.用HPlC和GPC法测定非离子表面活性材料(EO-复合体)中聚乙二醇的总含量
Surface active agents - Determination of the total polyethylene glycol content of non-ionic surface active agents (EO adducts) by HPLC/GPC; German version EN 12139:1999
The document specifies the determination of the total polyethylene glycol (PEG) content of aromatic and aliphatic nonionic surfactants of the type R-(O-C2H4)p-OH, p = mean ethylene oxide (EO) value to be determined if these substances are present in quantities of not less than approximately 0,1 percent by weight.