Electrochemical Behaviors of Meloxicam at AB and ［BnMIM］PF6 Modified Carbon Paste Electrode and Its Electrochemical Determination

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Electrochemical Behaviors of Meloxicam at AB and ［BnMIM］PF6 Modified Carbon Paste Electrode and Its Electrochemical Determination

- Electrochemical Behaviors of Meloxicam at AB and ［BnMIM］PF6 Modified Carbon Paste Electrode and Its Electrochemical Determination
- Vol. 33, Issue 12, Pages: 1368-1373(2014)
- 作者机构：
  
  1. 宁夏大学化学化工学院
  2. 银川大学石油化工学院
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Electrochemical Behaviors of Meloxicam at AB and ［BnMIM］PF6 Modified Carbon Paste Electrode and Its Electrochemical Determination. [J]. 33(12):1368-1373(2014)
DOI：

Electrochemical Behaviors of Meloxicam at AB and ［BnMIM］PF6 Modified Carbon Paste Electrode and Its Electrochemical Determination. [J]. 33(12):1368-1373(2014) DOI：

摘要

运用电化学方法研究了美洛昔康(Meloxicam,MLX)在乙炔黑(Acetylene black,AB)与离子液体(1-苄基-3-甲基咪唑六氟磷酸盐,［BnMIM］PF6)复合修饰碳糊电极(AB-［BnMIM］PF6/CPE)上的电化学行为。实验结果表明，AB-［BnMIM］PF6/CPE对MLX电化学氧化具有良好的促进作用。测定了MLX在此电极上的电极反应动力学参数，用SWV法测得MLX氧化峰电流与其浓度在6.0×10-7~1.0×10-5 mol?L-1及1.0×10-5~1.0×10-4 mol?L-1范围内呈良好线性关系，线性拟合方程分别为Ip(μA)=7.607+1 608 C(mmol?L-1)，r=0.993 4和Ip(μA)=20.68+267.6 C(mmol?L-1)，r=0.997 9，检出限(LOD,S/N=3)为2.2×10-8 mol?L-1。同时运用该方法对市售片剂中MLX含量进行了电化学测定，RSD为1.2%~3.0%，加标回收率为96.2%~100.1%。

Abstract

The electrochemical behaviors and electrochemical quantitative determination of meloxicam(MLX) at acetylene black(AB) and 1-benzyl-3-methylimidazole hexafluorophosphate(［BnMIM］PF6) ionic liquid composite modified carbon paste electrode(AB-［BnMIM］PF6/CPE) were investigated by electrochemical methods.The experimental results indicated that AB-［BnMIM］PF6/CPE showed a good promotion for MLX electrochemical oxidation.The electrode reaction kinetics parameters of MLX on AB-［BnMIM］PF6/CPE were measured.There are good linear relationships between oxidation peak current of MLX and its concentration in the ranges of 6.0×10-7-1.0×10-5 mol?L-1 and 1.0×10-5-1.0×10-4 mol?L-1.The linear equations are Ip(μA)=7.607+1 608 C(mmol?L-1)，r=0.993 4，and Ip(μA)=20.68+267.6 C(mmol?L-1)，r=0.997 9,respectively.The limit of detection(S/N=3) is 2.2×10-8 mol?L-1.The proposed method was successfully applied in the electrochemical quantitative determination of MLX contents in commercial tablet samples with RSDs of 1.2%-3.0% and recoveries of 96.2%-100.1%.

关键词

美洛昔康离子液体乙炔黑修饰碳糊电极电化学性质电分析方法

Keywords

meloxicam［BnMIM］PF6ABmodified carbon paste electrodeelectrochemical behaviorselectrochemical determination

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银川能源学院石油化工系

宁夏出入境检验检疫局

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宁夏大学化学化工学院能源化工重点实验室.2.宁夏医科大学高等卫生职业技术学院

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