標(biāo)準(zhǔn)號(hào)：BS EN 12582-1999
中文標(biāo)準(zhǔn)名稱：表面活性劑.用HPLC/ELSD方法根據(jù)非離子表面活性劑(乙氧基)中克分子質(zhì)量測(cè)定聚乙二醇含量
英文標(biāo)準(zhǔn)名稱：Surface active agents - Determination of the polyethylene glycol content according to molar mass in non-ionic surface active agents (ethoxylated) by HPLC/ELSD
標(biāo)準(zhǔn)類型：G72
發(fā)布日期：1999/9/15 12:00:00
實(shí)施日期：1999/9/15 12:00:00
中國(guó)標(biāo)準(zhǔn)分類號(hào)：G72
國(guó)際標(biāo)準(zhǔn)分類號(hào)：71.100.40
適用范圍：This European Standard specifies a method for the determination of the polyethylene glycol (PEG) content in aromatic and aliphatic non-ionic surface active agents of the type R-(O-C2H4) p OH; where p is the mean ethylene oxide (EO) value. It is applicable to all ethoxylated products soluble in methanol or methanol/water mixture. This method applies to PEG concentrations as mass fraction greater than or equal to 0,1 %. The method is not applicable to PEG whose molar mass is lower than 400 g/mol. Monomeric ethylene glycol, diethylene glycol, triethylene glycol and glycerol are not detected. NOTE Evaporative light scattering detector (ELSD) is convenient for routine methods.