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| Название (рус.): | Кислота фосфорная техническая. Определение содержания сульфатов. Метод восстановления и титриметрия |
| Название (англ.): | Phosphoric acid for industrial use; Determination of sulphate content; Method by reduction and titrimetry |
| Описание (англ.): | Applicable to products having sulphate contents equal to or more than 0.0005 % (m/m). Analysis by reduction of the sulphate to sulphide by a mixture of hydriodic acid and hypophosphorus acid. Absorption of the hydrogen sulphide evolved in a mixture of acetone and sodium hydroxide solution. Titration with a standard volumetric solution of mercury(II) acetate in the presence of dithizone as indicator. Has also been approved by the IUPAC. |
| Заменяет стандарты: | ISO/R 847:1968 |
| Дата регистрации: | 10.11.74 |
| Дата введения: | 01.11.74 |
| Код КГС: | Л19 |
| Код ОКСТУ: | 2121;2109 |
| Код ОКС(МКС): | 71.060.30 |
| Код ОКП: | 2121;2109 |
| Нормативные ссылки: | BS 4258 PART 3-1975, EQV*NBN T 03-263-1980, EQV*NF T20-471-1973, EQV*NP-1313-1976, EQV |
| Ключевые слова: | CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT PHOSPHORIC ACID PHOSPHORIC ACIDS REDUCTION METHODS SULPHATES VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN |
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