Фрукты, овощи и продукты их переработки. Определение содержания нитритов и нитратов. Спектрометрический метод молекулярной абсорбции
Название (англ.):
Fruits, vegetables and derived products; Determination of nitrite and nitrate content; Molecular absorption spectrometric method
Описание (англ.):
The method consists in extracting a test portion with hot water, precipitating the protein by addition of solutions of potassium hexacyanoferrate(II) and zinc acetate, and filtrating the precipitate. Further, reduction of the nitrate to nitrite by metallic cadmium (only for determining the nitrate). Then addition of sulfanilamide chloride and N-(1-naphtyl)ethylenediamine and measurement of the red complex obtained at a wavelength of 538 nm.
Дата регистрации:
01.01.85
Дата введения:
01.11.84
Код КГС:
Н59
Код ОКСТУ:
9709;9109
Код ОКС(МКС):
67.080.01
Код ОКП:
9709;9109
Ключевые слова:
AGRICULTURAL PRODUCTS CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT FRUIT-AND VEGETABLE PRODUCTS FRUITS NITRATES NITRITES SPECTROCHEMICAL ANALYSIS VEGETABLES CHEMICAL ANALYSIS AND TESTIN