Вещества поверхностно-активные. Детергенты. Определение содержания катионоактивных веществ. Часть 2. Низкомолекулярные катионоактивные вещества (между 200 и 500)
Название (англ.):
Surface active agents; detergents; determination of cationic-active matter content; part 2: cationic active matter of low molecular mass (between 200 and 500)
Описание (англ.):
The method is also suitable for other cationic-active materials. Not applicable if anionic and/or amphoteric surface active agents are present. The sample is titrated in a two-phase (aqueouschloroform) system against a standard anionic surface active agent in the presence of an indicator consisting of mixed anionic and cationic dyes. The cationic surface active agent present in the sample initially reacts with the anionic dye to form a salt which dissolves in the chloroform, imparting a blue colour to this layer. During the titration, the anionic surface active agent displaces the anionic dye and, at the end point, forms a salt with the cationic dye, imparting a greyish-pink colour to the chloroform layer.
Дата регистрации:
15.03.91
Дата введения:
15.12.90
Код КГС:
Л29
Код ОКСТУ:
2480;2381
Код ОКС(МКС):
71.100.40
Код ОКП:
2480;2381
Нормативные ссылки:
NF T73-321(1991/AFNOR), EQV*NF ISO 2871-2(1991/AFNOR), EQV*PREN 22871-2-1994, EQV*EN ISO 2871-2-1994, EQV*BS EN ISO 2871-2(1994/BSI), EQV*NF EN ISO 2871-2(1994/AFNOR), EQV*DIN EN ISO 2871-2-1994, EQV ISO 385-1-1984*ISO 607-1980*ISO 1042-1983*ISO 2271-1989*ISO 3696-1987
Ключевые слова:
CHEMICAL ANALYSIS AND TESTING DETERGENTS DETERMINATION OF CONTENT SURFACTANTS TESTING VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN