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| Название (рус.): | Криолит природный и искусственный. Определение содержания натрия. Спектрометрические методы эмиссии в пламени и атомной абсорбции в пламени |
| Название (англ.): | Cryolite, natural and artificial; Determination of sodium content; Flame emission and atomic absorption spectrophotometric methods |
| Описание (англ.): | The methods are applicable as alternatives to products for which the molar ratio NaF/AlF3 is equal to about 3. The principle of the flame emission method consists in atomization of the test solution in a flame of oxygen/hydrogen and determination by measurement of the intensity of the radiation at 589 nm. The principle ofthe flame atomic absorption method is based on atomization in an air/acetylene flame and measuremnt of the absorption of the 589 nm line emitted by a sodium hollow-cathode lamp. The preparation of the test solution is carried out by dissolution of a test portion in hydrochloric acid and water after attack by concentreted sulphuric acid. |
| Дата введения: | 01.11.74 |
| Код КГС: | Л19 |
| Код ОКСТУ: | 2157;2109 |
| Код ОКС(МКС): | 71.060.50 |
| Код ОКП: | 2157;2109 |
| Нормативные ссылки: | BS 5050-1974, NEQ*NBN T 03-436-1983, EQV |
| Ключевые слова: | ALUMINIUM ORES ATOMIC ABSORPTION METHOD ATOMIC ABSORPTION SPECTROPHOTOMETRY CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CRYOLITE DETERMINATION OF CONTENT FLAME PHOTOMETRY SODIUM ATOMIC ABSO CHEMICAL ANALYSIS AND TESTIN |
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