Гексафторсиликат натрия технический. Определение свободной кислотности и общего содержания гексафторсиликата. Титриметрический метод
Название (англ.):
Sodium hexafluorosilicate for industrial use; Determination of free acidity and total hexafluorosilicate content; Titrimetric method
Описание (англ.):
With respect to the free acidity, applicable to products having contents, expressed as H2 SiF6 , equal to or more than 0,1 % (m/m). First, determination of the free acid contents by titration of an ice-cooled test portion with a standard volumetric sodium hydroxide solution in the presence of potassium nitrate and using bromothymol blue as indicator, then, followed by titration at near boiling temperature with standard volumetric sodium hydroxide solution to the appearance ofa permanent blue colour.
Дата регистрации:
10.03.77
Дата введения:
01.03.77
Код КГС:
Л19
Код ОКСТУ:
2154;2146;2109
Код ОКС(МКС):
71.060.50
Код ОКП:
2154;2146;2109
Нормативные ссылки:
BS 5705 PART 1-1979, EQV*NBN T 03-526-1983, EQV*NF T20-531-1984, EQV
Ключевые слова:
ACIDITY CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICAL COMPOUNDS CONNECTIONS DETERMINATION OF CONTENT FLUOROSILICATES SODIUM SODIUM FLUOROSILICATES VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN FLUORINE SILICATES