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| Название (рус.): | Вещества поверхностно-активные неионные. Полиэтоксилированные производные. Определение гидроксильного числа. Метод с применением уксусного ангидрида |
| Название (англ.): | Non-ionic surface active agents; Polyethoxylated derivatives; Determination of hydroxyl value; Acetic anhydride method |
| Описание (англ.): | The hydroxyl group is esterified by acetic anhydride in pyridine solution. The excess of acetic anhydride is hydrolized with water. The acidity which appears during the esterification and the acetic acid formed during the hydrolysis are neutralized by sodium hydroxide solution in the presence of phenolphthalein as indicator. The hydroxyl value is calculated from the difference between the volume od sodium hydroxide solution used for the titration of theblank and of the test solution. |
| Дата регистрации: | 01.04.80 |
| Дата введения: | 01.03.80 |
| Код КГС: | Л99 |
| Код ОКСТУ: | 2480;2409 |
| Код ОКС(МКС): | 71.100.40 |
| Код ОКП: | 2480;2409 |
| Нормативные ссылки: | NBN T 63-142-1980, EQV*NF T73-272-1978, EQV*NP-2044-1983, EQV*BS 6829 PART 4 SECTION 4.6(1988/BSI), EQV |
| Ключевые слова: | CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CONNECTIONS DETERGENTS DETERMINATION HYDROXYL VALUE NON-IONIC ACTIVE MATTER NON-IONIC SURFACTANTS POLYETHOXYL COMPOUNDS SURFACTANTS CHEMICAL ANALYSIS AND TESTIN |
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