ISO 3794:1976 香精油（包括叔醇）.用乙酰化后测定酯化值法估定游离醇含量

标准编号：ISO 3794:1976

中文名称：香精油（包括叔醇）.用乙酰化后测定酯化值法估定游离醇含量

英文名称：Essential oils (containing tertiary alcohols) — Estimation of free alcohols content by determination of ester value after acetylation

发布日期：1976-12

标准范围

在二甲基苯胺存在下，通过乙酰氯和醋酸酐对精油进行乙酰化来进行评估。分离并干燥乙酰化油，并测定酯值。游离醇含量的计算考虑了相同但非乙酰化精油的酯值。该方法适用于含有一定比例叔醇（即芳樟醇和松油醇）的精油。它不适用于含有相当比例的酚类、邻氨基苯甲酸盐、内酯和醛类的精油。

The estimation is carried out by acetylation of the essential oil by acetyl chloride and acetic anhydride, in the presence of dimethylaniline. The acetylated oil is isolated and dried and the ester value is determined. The free alcohols content is calculated taking into account the ester values of the same but non-acetylated essential oil. This method is applicable to essential oils containing an appreciable proportion of tertiary alcohols, namely of linalol and terpineol. It is not applicable to essential oils containing appreciable proportions of phenols, anthranilates, lactones and aldehydes.

标准预览图