食品科学

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高效液相色谱法同时测定枣果实中的有机酸和VC含量

马倩倩1,吴翠云1,2,*,蒲小秋1,王 德1,孙亚强1   

  1. 1.塔里木大学植物科学学院,新疆生产建设兵团南疆特色果树生产工程实验室,新疆 阿拉尔 843300;
    2.塔里木大学 新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室,新疆 阿拉尔 843300
  • 出版日期:2016-07-25 发布日期:2016-07-26
  • 通讯作者: 吴翠云
  • 基金资助:

    兵团科技创新团队建设项目(2014CC006);兵团产学研重大专项(2013AA001-1);
    塔里木大学校长基金育种专项(TDYZZX201401)

Simultaneous Determination of Organic Acids and Vitamin C in Jujube Fruits by HPLC

MA Qianqian1, WU Cuiyun1,2,*, PU Xiaoqiu1 ,WANG De1, SUN Yaqiang1   

  1. 1. Engineering Laboratory of Characteristic Fruit Tree Production in Southern Xinjiang, Xinjiang Production and Construction Corps,
    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, Tarim University, Alar 843300, China
  • Online:2016-07-25 Published:2016-07-26
  • Contact: WU Cuiyun

摘要:

目的:建立枣果实中有机酸含量的高效液相色谱测定方法。方法:采用高效液相色谱-二极管阵列检测器法,水浴超声、离心、膜过滤提取枣果实中的有机酸。色谱条件:色谱柱为Inertsil ODS-3(4.6 mm×250 mm,5 μm),流动相为0.04 mol/mL KH2PO4溶液,流速0.5 mL/min,柱温30 ℃,检测波长210 nm。结果:在此色谱条件下,草酸、酒石酸、奎宁酸、苹果酸、柠檬酸、富马酸和VC在30 min之内得到基线分离。7 种有机酸和VC标准曲线的相关系数(R2)均在0.998 9以上;精密度检测,相对标准偏差为0.98%~4.77%(n=5);重复性检测,相对标准偏差为0.88%~2.19%(n=5);回收率在91.35%~105.74%之间。结论:本方法准确、高效、便捷,适于枣果实中有机酸的测定。

关键词: 高效液相色谱法, 枣, 有机酸, VC

Abstract:

Objective: This study aimed to establish and validate a high performance liquid chromatographic (HPLC) method
for the fast simultaneous determination of organic acids and vitamin C (VC) in jujube fruits. Methods: The analytes in
samples were extracted ultrasonically in a water bath, centrifugated and purified by membrane filtration for analysis by
HPLC with diode-array detection (DAD). The chromatographic column used was Inertsil ODS-3 (4.6 mm × 250 mm, 5 μm).
The separation was performed using 0.04 mol/L KH2PO4 (pH 2.40) as mobile phase at 0.5 mL/min flow rate by isocratic
elution. The column temperature and detection wavelength were set as 30 ℃ and 210 nm, respectively. Results: Under
these chromatographic conditions, 7 organic acids and VC could be successfully separated in 30 minutes. The coefficients
of determination (R2) of the standard calibration curves of the analyzed compounds were all above 0.998 9 and the precision
expressed as relative standard deviations were between 0.98% and 4.77% (n = 5) and the repeatability RSDs were in the
range of 0.88% to 2.19% (n = 5). The mean recovery rates of seven organic acids and vitamin C were in the range of 91.35%
to 105.74%. Conclusion: This method is an accurate, rapid, and applicable method to determine organic acids and vitamin C
in jujube fruits.

Key words: high performance liquid chromatography (HPLC), jujube, organic acid, vitamin C

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