食品科学 ›› 2005, Vol. 26 ›› Issue (12): 172-175.

• 分析检测 • 上一篇    下一篇

HPLC法测定蔬菜中草酸的干扰处理方法的研究

 丁健桦, 罗明标, 王兴祥, 涂祁伟   

  1. 东华理工学院应用化学系,中国科学院南京土壤研究所
  • 出版日期:2005-12-15 发布日期:2011-10-01

Study on Pretreatment Method for Determination of Oxalate in Vegetables by Reverse Phase High Performance Liquid Chromatography

 DING  Jian-Hua, LUO  Ming-Biao, WANG  Xing-Xiang, TU  Qi-Wei   

  1. 1.Department of Applied Chemistry, East China Institute of Technology; 2. Institute of Soil Science, Chinese Academy of Sciences
  • Online:2005-12-15 Published:2011-10-01

摘要: 采用AtlantisTMC18分析柱(250mm×4.6mmID,5μm),以ResinHZ201强碱型阴离子交换树脂消除样品中普遍存在的NO3干扰,建立了一种反相高效液相色谱法测定蔬菜中草酸的分离与分析方法,在紫外220nm条件下检测,线性范围为0.5~300μg/ml,变异系数为1.4%(n=10),检测限(S/N=3)可达23ng/ml,用于蔬菜中草酸含量的检测实验结果表明,该方法具有灵敏、回收率高(达100.2%~101.9%)、干扰消除效果好,而且操作简便、成本低等优点。

关键词: 反相高效液相色谱, 强碱型阴离子交换树脂, 干扰, 蔬菜, 草酸

Abstract: A method was established for the determination of oxalate in vegetables by Reversed Phase High Performance Liquid Chromatography with a reversed-phase AtlantisTM C18 column(250mm×4.6mm ID, 5μm)as immobile phase. The general interfering factor NO3 in samples was eliminated by using the powerful anion exchange resin - Resin HZ201. When detected with an UV detector at 220nm, the calibration curve showed a linear range of 0.5~300μ gml with a coefficient of variation of 1.4%(n=10)and a detection limit of 23 ngml(SN=3). It was found that the method was sensitive, with high percent recovery(from 100.2% to 101.9%), little disturbance, convenient and low cost.

Key words: reversed phase high performance liquid chromatography, strong base type anion- exchange resin, disturbance, vegetables, oxalate -