咖啡酸甲酯的电化学行为
Electrochemical Behavior of Methyl Caffeate
摘 要
采用循环伏安法研究了咖啡酸甲酯在玻碳电极上的电化学行为.在pH 4.8的乙酸-乙酸钠缓冲溶液中,咖啡酸甲酯在0.342 V和0.331 V处呈现出一对氧化还原峰,电化学过程中咖啡酸甲酯的电子转移数为2,参与反应的质子数也为2.咖啡酸甲酯的还原峰峰电流与其浓度在1.8×10-7~5.9×10-6mol·L-1范围内呈线性关系,检出限(3S/N)为1.0×10-7mol·L-1.对3.0×10-6mol·L-1咖啡酸甲酯溶液连续6次测定的相对标准偏差为2.4%.
电化学行为
咖啡酸甲酯
玻碳电极
Cyclic voltammetry
Electrochemical behavior
Methyl caffeate
Glassy carbon electrode
Abstract
Electrochemical behavior of methyl caffeate at glassy carbon electrode was studied by cyclic voltammetry. In an HOAc-NaOAc buffer solution of pH 4.8,a pair of oxidation and reduction peaks were observed at 0.342 V and 0.331 V (vs.SCE) respectively. The number of electronic transfer was found to be 2,and the number of protons takenpart in the reaction was also 2 in the electrochemical process of methyl caffeate. Linear relationship between values of reduction peak current and concentration of methyl caffeate was found in the range of 1.8×10-7-5.9×10-6mol·L-1,and the detection limit (3S/N) was 1.0×10-7mol·L-1. Test for precision was performed with 3.0×10-6mol·L-1 methyl caffeate solution,and the value of RSD (n=6) found was 2.4%.
中图分类号 O657.1
所属栏目 工作简报
基金项目 四川省自然科学基金项目(06ZD1105);西南科技大学2007年实验室开放基金项目
收稿日期 2009/4/22
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备注廖成玲(1986-),女,四川什邡人,主要从事应用化学专业.
引用该论文: LIAO Cheng-ling,LI Hai-liang,YU Ting-ting,LIANG Yan,JIANG Qi-ying,HE Ping,ZENG Qing-you. Electrochemical Behavior of Methyl Caffeate[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2010, 46(8): 935～937
廖成玲,李海亮,于婷婷,梁艳,蒋琪英,何平,曾庆友. 咖啡酸甲酯的电化学行为[J]. 理化检验－化学分册, 2010, 46(8): 935～937
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【5】陈江弢,杨崇仁.当归属植物的研究进展[J].天然产物研究与开发,2004,16(4):359-365．
【6】GMEZ-ALONSO S,GARCA-ROMERO E,HERMOSN-GUTIRREZ I. HPLC analysis of diverse grape and wine phenolics using direct injection and multidetection by DAD and fluorescence[J]. Food Compos Anal,2007,20(7):618-626．
【7】王波,刘屏,沈月毛.回心草化学成分研究[J].中国中药杂志,2005,30(2):895-897．
【8】WOJDYO A,OSZMIANSKI J,CZEMERYS R. Antioxidant activity and phenolic compounds in 32 selected herbs[J]. Food Chem,2007,105(3):940-949．
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