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| Название (рус.): | Кислота фосфорная техническая (в том числе для пищевой промышленности). Определение содержания кальция. Метод атомной абсорбции в пламени |
| Название (англ.): | Phosphoric acid for industrial use (including foodstuffs); Determination of calcium content; Flame atomic absorption method |
| Описание (англ.): | Applicable to products having a Ca content of more than 50 mg/kg. Soluble SiO2 present in the solution at levels lower than 5 g/ml does not interfere. The principle consists in addition, to a hydrochloric acid solution of the test portion, of sodium ions to promote and stabilize the emission of calcium and of lanthanum ions to suppress the interference ofaluminium. Specifies the aspiration of the solution into an acetylene-dinitrogen monoxide flame. Photometric measurement of the absorption of the 422.7-nm line emitted by a hollow- cathode calcium lamp. Has also been approved by the IUPAC. |
| Дата регистрации: | 10.01.77 |
| Дата введения: | 01.12.76 |
| Код КГС: | Л19 |
| Код ОКСТУ: | 2121;2109 |
| Код ОКС(МКС): | 67.220.20; 71.060.30 |
| Код ОКП: | 2121;2109 |
| Нормативные ссылки: | BS 4258 PART 8-1978, EQV*NBN T 03-268-1980, EQV*NF T20-480-1979, EQV*NP-1547-1978, EQV |
| Ключевые слова: | CALCIUM CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICAL COMPOUNDS CONNECTIONS DETERMINATION OF CONTENT FLAME PHOTOMETRIC ANALYSIS FLAME PHOTOMETRY FOOD ADDITIVES PHOSPHORIC ACID PHOSPHORIC ACIDS SPECTROPHOTOMETRIC ANALYSIS SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTIN |
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