Кислота борная, окись бора, динатрийтетраборат технические. Определение содержания марганца. Фотометрический метод с применением формальдоксима
Название (англ.):
Boric acid, boric oxide and Disodium tetraborates for industrial use; Determination of manganese content; Formaldehyde oxime photometric method
Описание (англ.):
The principle consists in removal of the boron by evaporation with methanol and separation of manganese and other metals from the residue, by extraction with chloroform, as their diethyldithiocarbamates. Wet destruction of the diethyldithiocarbamates with a sulphuric acid/ hydrogen peroxide mixture. Removal of any interfering iron by extraction as the thiocyanate.Formation of the coloured manganese formaldoxime complex in alkaline solution and photometric measurement at a wavelength of approximately 450 nm.
Дата введения:
01.07.72
Дата отмены:
30.05.02
Код КГС:
Л19
Код ОКСТУ:
2120;2109;2146
Код ОКС(МКС):
71.060.01
Код ОКП:
2120;2109;2146
Нормативные ссылки:
BS 5688 PART 6-1979, EQV*NBN T 03-346-1981, EQV*NF T20-561-1985, EQV*NF T20-562-1985, EQV*NF T20-565-1985, EQV*NP-1397-1976, EQV
Ключевые слова:
ACIDS BORATES BORIC ACID BORIC OXIDE CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT MANGANESE PHOTOMETRY PHOTOMETRY (CHEMICAL ANALYSIS) SODIUM SODIUM BORATES TETRABORATES CHEMICAL ANALYSIS AND TESTIN SPECTROCHEMICAL ANA