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| Название (рус.): | Пирофосфат натрия технический. Определение содержания пирофосфата. Потенциометрический метод |
| Название (англ.): | Sodium pyrophosphate for industrial use; Estimation of pyrophosphate content; Potentiometric method |
| Описание (англ.): | Applicable to products containing at least 90 % (m/m) of tetrasodium pyrophosphate and in the absence of more condensed forms of phosphates. The reaction based on conversion of tetrasodium pyrophosphate to disodium dihydrogenpyrophosphate by addition of hydrochloric acid. Introduction of zinc sulfate in solution for precipitation of zinc pyrophosphate and formation of sulphuric acid. Potentiometric titration of the sulphuric acid formedwith standard volumetric sodium hydroxide solution. Has also been approved by the IUPAC. |
| Дата регистрации: | 10.01.75 |
| Дата введения: | 01.12.74 |
| Дата отмены: | 30.05.02 |
| Код КГС: | Л19 |
| Код ОКСТУ: | 2148;2109 |
| Код ОКС(МКС): | 71.060.50 |
| Код ОКП: | 2148;2109 |
| Нормативные ссылки: | BS 4427 PART 6-1974, EQV*NBN T 03-297-1980, EQV*NF T20-491-1973, EQV*NP-1488-1977, EQV |
| Ключевые слова: | CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT POTENTIOMETRIC METHODS PYROPHOSPHATES SODIUM SODIUM PYROPHOSPHATES CHEMICAL ANALYSIS AND TESTIN |
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