Вещества поверхностно-активные. Стиральные порошки. Определение содержания неорганических сульфатов. Гравиметрический метод
Название (англ.):
Surface active agents; Washing powders; Determination of inorganic sulfates; Gravimetric method
Описание (англ.):
From a test portion all ethanol-soluble matter is removed by extraction with ethanol. In the presence of silicates the solution of the residue is treated with hydrochloric acid and evaporated to dryness. The residue is dissolved in water and the operations are repeated twice. The last solution is filtered and in the filtrate or in the silicatefree solution of the first step the sulfates are precipitated with barium chloride. Theprecipitate is filtered, washed, heated at 900 degree Celsius and weighed.
Дата регистрации:
01.02.86
Дата введения:
01.12.85
Код КГС:
У29
Код ОКСТУ:
2409;2480
Код ОКС(МКС):
71.100.40
Код ОКП:
2409;2480
Нормативные ссылки:
NBN T 63-159-1987, EQV*NF T73-705-1986, EQV*UNE 55-836-87-1987, EQV*NEN-ISO 8214(1986/NNI), EQV*NF ISO 8214(1986/AFNOR), EQV*BS 3762 PART 3 SECTION 3.22(1986/BSI), EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CONNECTIONS DETERGENTS DETERMINATION OF CONTENT GRAVIMETRIC ANALYSIS INORGANIC COMPOUNDS SULPHATES SURFACTANTS WASHING POWDERS CHEMICAL ANALYSIS AND TESTIN