Силикаты натрия и калия технические. Определение содержания диоксида кремния. Титриметрический метод
Название (англ.):
Sodium and potassium silicates for industrial use; Determination of silica content; Titrimetric method
Описание (англ.):
The principle consists in neutralization of the alkalinity of a test portion, previously dissolved, in presence of methyl red as indicator. Addition of sodium fluoride, which reacts with the silicic acid, forming a euaivalent quantity of sodium hydroxide. Addition of a measured volume of standard volumetric hydrochloric acid solution in excess, followed for diluting by ethanol.Filtration of the silicic compound thus obtained, which is insoluble under these conditions. Titration of the excess of hydrochloric acid in the filtrate with standard volumetric sodium hydroxide solution in presence of methyl red as indicator.
Дата введения:
01.06.72
Дата отмены:
30.05.02
Код КГС:
Л19
Код ОКСТУ:
2145;2109
Код ОКС(МКС):
71.060.50
Код ОКП:
2145;2109
Нормативные ссылки:
BS 6092 PART 7-1981, EQV*NBN T 03-240-1980, EQV*NP-1329-1976, EQV*SFS 3923(1988/SFS), NEQ
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT POTASSIUM POTASSIUM SILICATES SILICON DIOXIDE SODIUM SODIUM SILICATES VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN