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| Название (рус.): | Кислота фосфорная и фосфаты натрия технические (в том числе для пищевой промышленности). Определение содержания фтора. Фотометрический метод с применением комплексона ализарина и нитрата лантана |
| Название (англ.): | Phosphoric acid and sodium phosphates for industrial use (including foodstuffs); Determination of fluorine content; Alizarin complexone and lanthanum nitrate photometric method |
| Описание (англ.): | Applicable to products the F content of which is equal to or more than 0.5 mg/kg. Specifies the separation of the element from a test portion by steam distillation in a phosphoric acid medium. Formation of a blue-coloured complex with a combined reagent alizarin complexone/lanthanum nitrate in a buffered medium at the pH of 4.6. Addition of acetone to increase the stability of the complex and the sensitivity. Photometric measurement of the complex at awavelength of about 600 nm. |
| Дата регистрации: | 01.10.76 |
| Дата введения: | 01.08.76 |
| Код КГС: | Л19 |
| Код ОКСТУ: | 2121;2109;2148 |
| Код ОКС(МКС): | 67.220.20; 71.060.30; 71.060.50 |
| Код ОКП: | 2121;2109;2148 |
| Нормативные ссылки: | BS 4258 PART 4-1975, NEQ*BS 4427 PART 9-1975, NEQ*NBN T 03-265-1980, EQV*NF T20-479-1973, NEQ*NP-1546-1978, EQV |
| Ключевые слова: | CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICAL COMPOUNDS CONNECTIONS DETERMINATION OF CONTENT FLUORINE FOOD ADDITIVES FOOD INDUSTRY INDUSTRIES PHOSPHATES PHOSPHORIC ACID PHOSPHORIC ACIDS SODIUM SODIUM PHOSPHATES SPECTROPHOTOMETRIC ANALYSIS SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTIN ORTHOPHOSPHATES |
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