標準號：ISO 2268-1972
中文標準名稱：表面活性劑(非離子) 聚乙二醇和非離子活性物(加合物)的測定 威布爾法
英文標準名稱：Surface active agents (non-ionic); Determination of polyethylene glycols and non-ionic active matter (adducts); Weibull method
標準類型：G72
發(fā)布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G72
國際標準分類號：71.100.40
適用范圍：The method relies on the facts that both non-ionic adducts and polyethylene glycols are soluble in sodium chloride solution, but one is soluble in ethyl acetate whereas the other is not. Separation of the polyethylene glycols and the adducts is, therefore, possible by the following methods: Dissolution of the sample in ethyl acetate and extraction of polyethylene glycols by sodium chloride solution. Extraction of the polyethylene glycols isolated in the sodium chloride solution with chloroform, removal of the solvent and weighing of the residue. Evaporation of the ethyl acetate solution which contains the adducts and weighing of the residue.