Вещества поверхностно-активные неионные. Полиоксиалкильные производные. Определение гидроксильного числа. Метод с применением фталевого ангидрида
Название (англ.):
Non-ionic surface active agents; Polyalkoxylated derivatives; Determination of hydroxyl value; Phthalic anhydride method
Описание (англ.):
The hydroxyl groups are esterified by phthalic anhydride in pyridine solution. The excess of phthalic anhydride is hydrolyzed with water containing in the sodium hydroxide solution used for the neutralization. The acidity which appears during the esterification and of the phthalic acid formed during the hydrolysis is neutralized by sodium hydroxidesolution in the presence of phenolphthalein as indicator. The hydroxyl value is calculated from the difference between the volumes of sodium hydroxide solution used for the titration of the blank and of the test solution.
Дата регистрации:
01.01.80
Дата введения:
01.12.79
Код КГС:
Л99
Код ОКСТУ:
2480;2409
Код ОКС(МКС):
71.100.40
Код ОКП:
2480;2409
Нормативные ссылки:
NBN T 63-143-1980, EQV*NEN-ISO 4327-1983, EQV*NF T73-273-1978, NEQ*NP-2045-1983, EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CONNECTIONS DETERGENTS DETERMINATION HYDROXYL VALUE NON-IONIC ACTIVE MATTER NON-IONIC SURFACTANTS POLYALKOXYLATED COMPOUNDS SURFACTANTS CHEMICAL ANALYSIS AND TESTIN