Вещества поверхностно-активные (неионные). Определение содержания полиэтиленгликоля и неионных активных веществ (продуктов присоединения). Метод Вейбула
Название (англ.):
Surface active agents (non-ionic); Determination of polyethylene glycols and non-ionic active matter (adducts); Weibull method
Описание (англ.):
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 ethylacetate 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.
Дата введения:
01.11.72
Код КГС:
Л29
Код ОКСТУ:
2480;2409
Код ОКС(МКС):
71.100.40
Код ОКП:
2480;2409
Нормативные ссылки:
AMD 4706-1985, NEQ*AMD 5369-1986, NEQ*BS 3762-1964, NEQ*DIN ISO 2268-1980, EQV*NBN T 63-120-1980, EQV*NF T73-274-1978, NEQ*NP-1716-1981, EQV*PD 5440-1965, NEQ*UNE 55-519-74-1974, EQV*BS 6829 PART 4 SECTION 4.2(1989/BSI), EQV
Ключевые слова:
BY-PRODUCTS BYPRODUCTS CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHLOROFORM CONDENSATES DETERGENTS DETERMINATION OF CONTENT ETHYL ACETATE EXTRACTION LABORATORY WARE POLYOXYETHYLENE SAMPLES SODIUM CHLORIDE SOLUBILITY SURFACE ACTIVE AGENTS SURFACTANTS TESTING CHEMICAL ANALYSIS AND TESTIN LABORATORY EQUIPMENT