食品科学

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蒽酮法测定红枣可溶性糖含量条件的优化

位 杰1,吴翠云1,2,蒋 媛1,王合理1,*   

  1. 1.塔里木大学植物科学学院,新疆 阿拉尔 843300;
    2.新疆生产建设兵团塔里木盆地生物资源保护利用兵团重点实验室,新疆 阿拉尔 843300
  • 出版日期:2014-12-25 发布日期:2014-12-29
  • 通讯作者: 王合理
  • 基金资助:

    国家自然科学基金地区科学基金项目(31260459);新疆研究生科研创新项目(XJGRI2013153);
    兵团重大产学研合作科技专项(2010ZX02);塔里木大学创新群体研究项目(TDZXCX1001)

Sample Preparation Optimization for Determination of Soluble Sugar in Red Jujube Fruits by Anthrone Method

WEI Jie1, WU Cui-yun1,2, JIANG Yuan1, WANG He-li1,*   

  1. 1. College of Plant Science, Tarim University, Alar 843300, China; 2. Xinjiang Production and Construction Corps
    Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Alar 843300, China
  • Online:2014-12-25 Published:2014-12-29
  • Contact: WANG He-li

摘要:

以红枣为试材,通过单因素试验研究反应温度、蒽酮质量浓度、蒽酮用量、显色反应时间、冷却时间对红枣可溶性糖含量测定的影响,并采用正交试验优化测定红枣可溶性糖含量的最佳反应条件。结果表明,红枣可溶性糖含量测定的最佳条件为:蒽酮质量浓度25 mg/mL、蒽酮试剂用量3 mL、室温反应时间1 min、冷却时间25 min。该方法操作简便、快速、灵敏度高。验证实验结果表明,蔗糖标准液含量在20~240 μg/mL范围内有较好的线性关系(A=0.004 5C-0.013 4,相关系数为R2=0.999 2,式中,A为吸光度;C为糖含量)。实验重现性好,相对标准偏差(relative standard deviation,RSD)为0.20%(n=3);平均回收率达102.87%,RSD为0.84%(n=3)。最佳优化条件下测得的红枣可溶性糖含量为68.43%(以干质量计)。

关键词: 蒽酮法, 红枣, 可溶性糖, 优化

Abstract:

This paper reports the optimization of sample preparation conditions including reaction temperature, anthrone
concentration and amount, color development time and cooling time for the determination of soluble sugar in red jujube
fruits using a combination of single factor and orthogonal array designs. The results showed that 1 min reaction at room
temperature in the presence of 3 mL of 25 mg/mL anthrone reagent followed by 25 min of cooling was found to be optimal.
The established analytical method was characteristics of simple operation, rapidity and high sensitivity. Verification
experiments showed that the standard curve of sucrose standard solution in the range of 20–240 mg/mL had good linearity
(A = 0.004 5C - 0.013 4, R2 = 0.999 2), with a good reproducibility. The accuracy, expressed as RSD, was 0.20% (n = 3)
and the average recovery was 102.87% (n = 3) with a RSD of 0.84%. Dried red jujubes contained 68.43% soluble sugar as
determined by this method.

Key words: anthrone method, red jujube, soluble sugar, optimization

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