色谱

色谱 ›› 2016, Vol. 34 ›› Issue (3): 314-320.DOI: 10.3724/SP.J.1123.2015.09017

• 研究论文 • 上一篇    下一篇

甲基苯脲β-环糊精高效液相色谱键合相拆分手性农药粉唑醇对映体

曾春1, 李来生1,2, 程彪平2, 张宏福1, 曹志刚1, 周志勇1   

  1. 1. 南昌大学化学学院, 江西 南昌 330031;
    2. 南昌大学分析测试中心, 江西 南昌 330047
  • 收稿日期:2015-09-16 出版日期:2016-03-08 发布日期:2012-09-28
  • 通讯作者: 李来生
  • 基金资助:

    国家自然科学基金项目(21165012);江西省自然科学基金项目(2010GZH0089);江西省教育厅科技重点项目(GJJ150019).

Enantioseparation of chiral pesticide flutriafol enantiomers on a methyl phenyl ureado β-cyclodextrin-bonded stationary phase by high performance liquid chromatography

ZENG Chun1, LI Laisheng1,2, CHENG Biaoping2, ZHANG Hongfu1, CAO Zhigang1, ZHOU Zhiyong1   

  1. 1. College of Chemistry, Nanchang University, Nanchang 330031, China;
    2. Center of Analysis Testing, Nanchang University, Nanchang 330047, China
  • Received:2015-09-16 Online:2016-03-08 Published:2012-09-28
  • Supported by:

    National Natural Science Foundation of China (No. 21165012); Natural Science Foundation of Jiangxi Province (No. 2010GZH0089); Jiangxi Province Education Commission Key Foundation (No. GJJ150019).

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摘要：

制备了一种新型的对甲苯脲衍生化 β-环糊精键合有序介孔SBA-15手性固定相(UCDP),通过红外光谱和元素分析对其结构进行了基本表征。将新固定相用于手性农药粉唑醇对映体的拆分,考察了流动相组成和温度对分离的影响,通过优化分离条件,在反相色谱条件下成功地拆分了粉唑醇对映体。优化的色谱条件为:甲醇-水(40 : 60, v/v)为流动相,流速为0.5 mL/min,柱温为25 ℃,选择205 nm检测波长进行检测。在上述条件下,两对映体的分离度可达1.99,分析时间不超过20 min。在此基础上建立了快速测定香蕉中三唑类手性杀菌剂粉唑醇对映体残留量的新方法,两对映体在0.5~125 mg/L范围均具有良好的线性关系(r=0.9997),标准添加法测得粉唑醇对映体的平均回收率为93.4%~101.7%, RSD为1.07%~2.06%(n=4)。按3倍信噪比确定检出限为0.06 mg/L。与常用的涂覆型纤维素固定相相比,新固定相的制备方法简便,制备成本较低。单取代脲键环糊精固定相不仅有稳定的化学结构和色谱性能,而且对粉唑醇对映体显示出较高的分离选择性,所建立的方法可用于快速监测食品中农药对映体残留量,对解决食品中的手性农药安全问题有着重要的研究意义。

关键词: -环糊精键合相, 粉唑醇对映体, 高效液相色谱法, 甲基苯脲 &beta, 食品安全, 香蕉

Abstract:

A new mono-methyl phenyl ureado β-cyclodextrin-bonded order mesoporous SBA-15 chiral stationary phase (UCDP) was prepared. The basic structure characterization of the new stationary phase was carried out by infrared spectroscopy and elemental analysis. The new packing material was used to separate chiral fungicide flutriafol enantiomers by HPLC. The effects of the composition of mobile phase and column temperature on the enantioseparation of flutriafol were investigated. The flutriafol enantiomers were successfully resolved under the optimized conditions, which were as follows: methanol-water (volume ratio of 40 : 60) as mobile phase at a flow rate of 0.5 mL/min, the column temperature at 25 ℃, the detection wavelength at 205 nm. The resolution of the two enantiomers was up to 1.99 within 20 min under the above conditions. Based on the study, a new method for the determination of flutriafol enantiomers in banana was established. Good linear relationships were observed in the mass concentration range of 0.5-125 mg/L (r=0.9997) for the two enantiomers. The average spiked recoveries were 93.4%-101.7% with RSDs of 1.07%-2.06% (n=4). The detection limit was 0.06 mg/L (S/N=3). Compared with the commonly used cellulose stationary phase, the preparation of new stationary phase is simple at low cost. The β-cyclodextrin-bonded stationary phase with mono-methyl phenyl ureado has high chemical stability, reproducible chromatographic property and high selectivity for flutriafol enantiomers. The developed analytical method is suitable for the fast monitoring of chiral pesticide residues in foods and has research significance to solve the food safety problems of chiral chemicals.

Key words: banana, flutriafol enantiomer, food safety, high performance liquid chromatography (HPLC), methyl phenyl ureado β-cyclodextrin-bonded phase

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