Вещества поверхностно-активные. Стиральные порошки. Определение общего содержания кремния. Гравиметрический метод
Название (англ.):
Surface active agents; Washing powders; Determination of total silica content; gravimetric method
Описание (англ.):
From a test portion all ethanol-soluble matter is removed by extraction with ethanol. The solution of the ethanol-insoluble residue is treated with hydrochloric acid and evaporated to dryness. The residue is dissolved in water and the operations are repeated twice. From the solution obtained after this operations the precipitate is filtered, washed, heated to 900
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 63-160-1987, EQV*NF T73-706-1986, EQV*UNE 55-837-87-1987, EQV*NEN-ISO 8215(1986/NNI), EQV*NF ISO 8215(1986/AFNOR), EQV*BS 3762 PART 3 SECTION 3.21(1986/BSI), EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERGENTS DETERMINATION OF CONTENT GRAVIMETRIC ANALYSIS SILICON DIOXIDE SURFACTANTS WASHING POWDERS CHEMICAL ANALYSIS AND TESTIN