自动电位滴定法测定马蹄中的总还原糖

Determination of Reducing Sugar in Eleocharis dulcis by Automatic Potentiometric Titration

[目的]研究自动电位滴定法测定马蹄中总还原糖含量的新体系。[方法]根据菲林氏间接碘量法的原理,应用自动电位滴定法测定,确定了体系的最优条件。[结果]方法测定的标准偏差为2.47%,RSD为1.30%,加标回收率为99.2%~102.5%,平均回收率为99.26%。[结论]该法操作简便快速、结果准确,为果品糖分含量提供有效的测定方法。

[Objective] To study the new system for determining the reducing sugar in Eleocharis dulcis by automatic potentiometric titration.[Method] According to the principles of Film＇s indirect iodometric method,the automatic potentiometric titration was adopted to detect the content of reducing sugar,and the optimal conditions of the system were determined.[Result] The standard deviation detected by the method was 2.47%,RSD was 1.30%,the added recovery was 99.2%-102.5%,and the average recovery was 99.26%.[Conclusion] The method was easy,rapid and accurate,which provided effective method for determining the sugar content of fruit products.