|
| Название (рус.): | Криолит природный и искусственный. Определение содержания кальция. Метод атомной абсорбции в пламени |
| Название (англ.): | Cryolite, natural and artificial; Determination of calcium content; Flame atomic absorption method |
| Описание (англ.): | Describes the preparation of the calibration graph and the dissolution of a test portion in concentrated sulphuric acid and heating on a hot-plate until the hydrofluoric acid has evaporated. Treatment of the residue with concentrated hydrochloric acid. Aspiration of the solution into an acetylene/dinitrogen monoxide flame and spectrophotometric measurement of the absorption of the 422.7-nm line emitted by a calcium hollow cathode lamp. |
| Дата регистрации: | 01.10.76 |
| Дата введения: | 01.09.76 |
| Код КГС: | А39 |
| Код ОКСТУ: | 1711;1709 |
| Код ОКС(МКС): | 71.060.50 |
| Код ОКП: | 1711;1709 |
| Нормативные ссылки: | BS 4993 PART 1-1974, NEQ*BS 5050 PART 8-1980, EQV*BS 5050-1974, NEQ*NBN T 03-442-1983, EQV |
| Ключевые слова: | ALUMINIUM ORES ATOMIC ABSORPTION SPECTROMETRY ATOMIC ABSORPTION SPECTROPHOTOMETRY CALCIUM CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CRYOLITE DETERMINATION OF CONTENT SPECTROPHOTOMETRIC ANALYSIS SPECTROPHOTOMETRY ATOMIC ABSO CHEMICAL ANALYSIS AND TESTIN |
|