| 共价有机聚合物固相萃取/高效液相色谱法测定面粉中3种荧光增白剂 |
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| 基金项目:国家自然科学基金项目（81603286）；山东省农业重大应用技术创新项目（2018） |
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| 中文摘要:以三氯化铋为催化剂，使2,4,6 三羟基 1,3,5 苯三甲醛和2,6 二氨基吡啶在低温下快速形成亚胺键，成功制备出具有良好吸附性能的共价有机聚合物。通过傅立叶红外光谱和氮气吸附实验对聚合物进行表征，结果显示，亚胺键合的多孔聚合物已成功合成且具有良好的比表面积。将制备的多孔聚合物用于固相萃取填料，建立了面粉中3种荧光增白剂的高效液相色谱检测方法。方法学验证结果表明，3种荧光增白剂在1~100 μg·L-1范围内线性关系良好，检出限（LODs，S/N=3）为015~027 μg·kg-1，定量下限（LOQs，S/N=10）为050~089 μg·kg-1。在不同加标水平下，方法的平均回收率为812%~102%，相对标准偏差（RSDs）为43%~127%。该方法具有操作简单、准确、灵敏度高的优点，可用于面粉样品的测定。 |
| 中文关键词:面粉 荧光增白剂 共价有机聚合物 固相萃取（SPE） 高效液相色谱（HPLC） |
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| Analysis of Three Fluorescent Whitening Agents in Flour by High Performance Liquid Chromatography with Covalent Organic Polymers Based Solid Phase Extraction |
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| Abstract:A method of high performance liquid chromatography with solid phase extraction using covalent organic polymers（COPs） was developed for the analysis of three fluorescent whitening agents（FWAs） in flour.The COPs with satisfactory adsorption performance were successfully synthesized by the Schiff base reaction of 1,3,5 triformylphloroglucinol and 2,6 diaminopyridine at room temperature,using BiCl3 as catalyst,then characterized by Fourier transform infrared spectroscopy（FT-IR） and nitrogen adsorption experiment.Results showed that the imine linked COPs with good specific surface area were successfully constructed.The synthesized COPs were used as the SPE sorbent in the extraction of three FWAs in flour,and finally the three FWAs were determined by high performance liquid chromatography（HPLC）.Under the optimum conditions,the method exhibited good linear relationships for the analytes in the range of 1-100 μg·L-1 with limits of detection（LODs,S/N=3） and limits of quantitation（LOQs,S/N=10） of 015-027 μg·kg-1 and 050-089 μg·kg-1,respectively.The recoveries for three FWAs in flour at three spiked levels ranged from 812% to 102% with relative standard deviations（RSDs） of 43%-127%.The developed method was simple,accurate and sensitive,and could be applied in the determination of FWAs in flour samples. |
| Key Words:flour fluorescent whitening agents covalent organic polymers solid phase extraction（SPE） high performance liquid chromatography（HPLC） |
| 引用本文：丁惠，纪文华，贺吉香.共价有机聚合物固相萃取/高效液相色谱法测定面粉中3种荧光增白剂[J].分析测试学报,2018,37(12):1418-1424. |
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