气相色谱法测定烟用香精中的乙醇、1,2-丙二醇和丙三醇

为了准确测定烟用香精中溶剂的含量,以1,4-丁二醇为内标建立了检测烟用香精中乙醇、1,2-丙二醇和丙三醇的气相色谱法,采用该方法测定了30个烟用香精样品。结果表明:该方法的检出限和定量限范围在0.019～0.088和0.063～0.293g/L之间;回收率在97.5%～101.6%之间;相对标准偏差(RSD)为0.61%～0.89%。所测样品中均检出1,2-丙二醇,均未检出丙三醇;13个样品中检测出乙醇。该方法前处理简单、灵敏度高、定性定量准确,适用于烟用香精中乙醇、1,2-丙二醇和丙三醇的定性定量分析。

Determination of ethanol, 1, 2-propylene glycol and glycerol in tobacco flavor with gas chromatography method

In order to accurately determine the content of solvents in tobacco flavors, a gas chromatography method was developed for the determination of ethanol, 1,2-propylene glycol and glycerol in tobacco flavor using 1,4-butanediol as an internal standard. Thirty tobacco flavor samples were tested by this method. Results show that the limit of detection and limit of quantitation are 0.019-0.088 and 0.063-0.293 g/L, respectively. The recoveries are 97.5%-101.6% with the relative standard deviations(RSD)ranging from 0.61% to 0.89%. 1,2-propylene glycol is detected, while glycerol is not detected in all samples;ethanol is detected in thirteen samples. This method has the advantages of simple pretreatment, high sensitivity and high accuracy, and is suitable for the determination of ethanol, 1,2-propylene glycol and glycerol in tobacco flavor.