紫外分光光度法测量白酒中糠醛的挥发速度

Determination of Furfural Volatilization Rate in Baijiu by Ultraviolet Spectrophotometry

本文采用紫外分光光度法,在277 nm处测定白酒中的糠醛,以50%无水乙醇为空白对照,对放置于空气中的不同时间段的白酒中的糠醛浓度进行测量,以此研究白酒中糠醛的挥发速度。结果表明,白酒中的糠醛平均挥发速度为0.007 46 mg·L^(-1)·min^(-1),为判断白酒风味的改变提供了技术方案。

In this paper,the furfural in Baijiu was determined at 277 nm by ultraviolet spectrophotometry.50%anhydrous ethanol was used as blank control to measure the furfural concentration in Baijiu placed in air at different time periods,so as to study the volatilization rate of furfural in Baijiu.The results showed that the average volatilization rate of furfural in Baijiu was 0.00746 mg·L^(-1)·min^(-1),which provided a technical scheme for determining the change of Baijiu flavor.