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| Название (рус.): | Кислота фосфорная техническая. Определение содержания мышьяка. Фотометрический метод с применением диэтилдитиокарбамата серебра |
| Название (англ.): | Phosphoric acid for industrial use; Determination of arsenic content; Silver diethyldithiocarbamate photometric method |
| Описание (англ.): | Applicable to products having As contents of more than 0.1 mg/kg. Relates to the method of analysis according to ISO 2590. Reduction of the As by zinc in a hydrochloric acid solution with the formation of arsine. Absorption of the arsine in a solution of silver diethyldithiocarbamate in pyridine. Photometric measurement of the purplish-red colour produced by the colloidally dispersed silver at the maximum of the absorption curve at a wavelength of about 540 nm. Determination of the quantity of Asby means of the calibration curve. |
| Дата регистрации: | 10.01.77 |
| Дата введения: | 01.08.75 |
| Дата отмены: | 30.05.02 |
| Код КГС: | Л19 |
| Код ОКСТУ: | 2121;2109 |
| Код ОКС(МКС): | 71.060.30 |
| Код ОКП: | 2121;2109 |
| Нормативные ссылки: | BS 4258 PART 6-1976, EQV*NBN T 03-264-1980, EQV*NF T20-475-1973, EQV*NP-1356-1976, EQV |
| Ключевые слова: | ARSENIC CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT PHOSPHORIC ACID PHOSPHORIC ACIDS SPECTROPHOTOMETRIC ANALYSIS SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTIN |
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