Вещества поверхностно-активные. Определение стабильности в жесткой воде
Название (англ.):
Surface active agents; Determination of stability in hard water
Описание (англ.):
Solutions of the substance to be tested in differing concentrations are mixed with hard water solutions of differing known calcium hardness. After leaving the solutions to stand in specified conditions their appearance, i.e. clearness, opalescence, cloudiness or precipitation is observed. The method is applicable to surface active agents soluble in water at 20
Дата введения:
01.12.74
Код КГС:
Л29
Код ОКСТУ:
2480;2409
Код ОКС(МКС):
71.100.40
Код ОКП:
2480;2409
Нормативные ссылки:
DIN 53905-1986, NEQ*NBN T 63-113-1980, EQV*NF T73-401-1967, EQV*UNE 55-507-89 1R(1989/AENOR), EQV
Ключевые слова:
CHEMICAL ANALYSIS AND TESTING CHEMICAL TESTS HARD WATER HARDNESS (OF WATER) RESISTANCE STABILITY SURFACTANTS CHEMICAL ANALYSIS AND TESTIN WATER