ISO 2268-1972 表面活性剂(非离子) 聚乙二醇和非离子活性物(加合物)的测定 威布尔法
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标准号:ISO 2268-1972
中文标准名称:表面活性剂(非离子) 聚乙二醇和非离子活性物(加合物)的测定 威布尔法
英文标准名称:Surface active agents (non-ionic); Determination of polyethylene glycols and non-ionic active matter (adducts); Weibull method
标准类型:G72
发布日期:1999/12/31 12:00:00
实施日期:1999/12/31 12:00:00
中国标准分类号:G72
国际标准分类号:71.100.40
适用范围: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.
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