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| Название (рус.): | Фтороводород безводный технический. Определение содержания гексафторкремниевой кислоты. Фотометрический метод с применением восстановленного молибдосиликата |
| Название (англ.): | Anhydrous hydrogen fluoride for industrial use; Determination of hexafluorosilicic acid content; Reduced molybdosilicate photometric method |
| Описание (англ.): | Applicable to products having H2 SiF6 contents between 0.01 % (m/m) and 0.2 % (m/m). Gives introductory instructions to the risk in handling with the product. The principle of analysis consists in formation of oxidized molybdosilicate (yellow) in weakly acid medium in the presence of boric acid to suppress interference by fluorine. Selective reduction of this complex afteraddition of sulphuric acid solution and oxalic acid to eliminate interference from phosphates. Photometric measurement of the blue coloured complex at a wavelength of about 795 nm. |
| Дата регистрации: | 10.07.76 |
| Дата введения: | 01.06.76 |
| Дата отмены: | 30.05.02 |
| Код КГС: | Л19 |
| Код ОКСТУ: | 2114;2109 |
| Код ОКС(МКС): | 71.060.30 |
| Код ОКП: | 2114;2109 |
| Нормативные ссылки: | BS 5365 PART 4-1979, EQV*NBN T 03-516-1983, EQV*NF T20-331-1984, EQV |
| Ключевые слова: | ACIDS CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICAL COMPOUNDS CONNECTIONS DETERMINATION OF CONTENT FLUORSILICIC ACID HYDROGEN FLUORIDE SPECTROPHOTOMETRIC ANALYSIS SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTIN |
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