酶电极法快速测定黄原胶中乙醇含量

Rapid determination for ethyl alcohol in xanthan gum by enzyme electrode

摘要: 采用酶电极法对市售黄原胶中乙醇含量进行了测定,同时优化了仪器进样条件及样品前处理条件。实验结果表明,应用酶电极法测定乙醇,该方法的线性相关系数为0.9994;方法的检出限为0.02%;仪器检测速度为20s;测得不同浓度下方法的回收率为83.3%~93.3%;精密度实验的相对标准偏差(RSD)均在3%以下,稳定性好。该方法操作简单,能满足对黄原胶产品中的乙醇含量的快速检测。

Abstract: The ethyl alcohol in xanthan gum was determined by enzyme electrode, the instrument conditions and the pre-treatment conditions were further optimized. The results showed that this method had excellent linear relationship with the correlation coefficient of 0.9994 and the detection limit of the method was 0.02%. The detection rate of instrument was 20 s. The recovery rates were 83.3%~93.3% and the relative standard deviation were all below 3%. This developed method was easy, sensitive and reliable, which could be used to analyze ethyl alcohol in xanthan gum.