Хлорид калия технический. Определение содержания калия. Гравиметрический метод с применением тетрафенилбората калия
Название (англ.):
Potassium chloride for industrial use; Determination of potassium content; Potassium tetraphenylborate gravimetric method
Описание (англ.):
The method is applicable to products having a minimum KCL content of about 95 % (m/m). The principle consists in dissolution of a test portion taken from the laboratory sample, previously ground and sifted. Addition of formaldehyde solution to transform any ammonium ions present into hexamethylenetetramine, and of ethylenedinitrilotetraacetic acid, disodium salt, to complex any extraneous cations present which could cause excess errors. These; additions in no case have a detrimental effect on its precision or reproducibility. Precipitation of the potassium by sodium tetraphenylborate in a weakly alkaline medium, drying and weighing of the precipitate.
Дата введения:
01.02.76
Дата отмены:
30.05.02
Код КГС:
Л19
Код ОКСТУ:
2109;2147
Код ОКС(МКС):
71.060.50
Код ОКП:
2109;2147
Нормативные ссылки:
NBN T 03-222-1980, EQV*NF T20-356-1978, EQV*NP-1475-1977, EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICALS DETERMINATION OF CONTENT GRAVIMETRIC ANALYSIS POTASSIUM POTASSIUM CHLORIDE TETRAPHENYLBORATES CHEMICAL ANALYSIS AND TESTIN BORON ORGANIC COMPOUNDS