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| Название (рус.): | Топливо твердое минеральное. Определение содержания фосфора. Фотометрический метод с применением восстановленного молибдофосфата |
| Название (англ.): | Solid mineral fuels; Determination of phorphorus content; Reduced molybdophosphate photometric method |
| Описание (англ.): | For taking the phosphorus into solution the following two methods are specified: The carbonaceous material is removed by ashing in amuffle furnace under specified conditions and the phosphorus is extracted by treatment with hydrofluoric and sulphuric acids. The carbonaceous material is removed by repeated oxidation with nitric acid in the presence ofsulphuric acid. The determination is carried out by adding ammonium molybdate and ascorbic acid solution and measuring the absorbance of the resulting blue solution by a siutable optical instrument. |
| Заменяет стандарты: | ISO/R 926:1969 |
| Дата регистрации: | 01.10.81 |
| Дата введения: | 01.08.81 |
| Код КГС: | А19 |
| Код ОКСТУ: | 0309 |
| Код ОКС(МКС): | 75.160.10 |
| Код ОКП: | 0309 |
| Нормативные ссылки: | BS 1016 PART 9-1977, EQV*DIN 51725-1979, NEQ*DIN 51727-1976, NEQ*DS/ISO 622-1983, EQV*SS 18 71 62-1984, NEQ |
| Ключевые слова: | CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING COAL COKE DETERMINATION OF CONTENT LIGNITE PHOSPHATES PHOSPHORUS SOLID FUELS SPECTROSCOPIC ANALYSIS SPECTROSCOPY CHEMICAL ANALYSIS AND TESTIN ORTHOPHOSPHATES |
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