Спирт бутиловый вторичный, метилэтилкетон, изобутилметилкетон, изоамилэтилкетон, диацетоновый спирт и гексиленгликоль технические. Определение кислотности по фенолфталеину. Волюметрический метод
Название (англ.):
secButyl alcohol, methyl ethyl ketone, isobutyl methyl ketone, isoamyl ethyl ketone, diacetone alcohol and hexylene glycol for industrial use; Determination of acidity to phenolphthalein; Volumetric method
Описание (англ.):
Lays down the treatment of a test portion by dilution with water (or with ethanol or propan-2-ol if the sample is not completely soluble in water) and removal of carbon dioxide by passing a strem of nitrogen through the solution. The determination is carried out by titration with a standard volumetric sodium hydroxide solution using phenolphthalein as indicator. The nitrogen used shall be free from ammonia and carbon dioxide.