標準號：ISO 1271-1983
中文標準名稱：精油 羰值的測定 游離羥胺法
英文標準名稱：Essential oils; Determination of carbonyl value; Free hydroxylamine method
標準類型：Y40
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：Y40
國際標準分類號：71.100.60
適用范圍：The determination is carried out by converting the carbonyl compounds to oximes by reaction with free hydroxylamine liberated in a mixture of hydroxylammoniumchloride and potassium hydroxide. The excess alkali is titrated with hydrochloric acid solution, either colorimetrically or potentiometrically. The method is applicable to essential oils which contain carbonyl compounds (especially ketones, excluding methylketones) which are difficult to convert to oximes by the method specified in ISO 1279. The method is not applicable to essential oils which contain substantial amounts of esters of other alkali-sensitive constituents.