Characterization of a graphite powder-ionic liquid paste coated gold electrode, and a method for voltammetric determination of promethazine

被引：31

作者：

Li, Jiangwen ^{[1
]}

Zhao, Faqiong ^{[1
]}

Zeng, Baizhao ^{[1
]}

机构：

[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China

来源：

MICROCHIMICA ACTA | 2007年 / 157卷 / 1-2期

关键词：

ionic liquid; graphite powder; paste electrode; promethazine; voltammetry;

D O I：

10.1007/s00604-006-0662-2

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A graphite powder - ionic liquid (1- butyl-3- methylimidazolium hexafluorophosphate, BMIMPF6) paste coated gold electrode ( graphite - BMIMPF6/Au) is presented. The area and the thickness of the paste film are controlled through a sticking film with a hole. The electrode shows good stability and high electric conductivity, and K4Fe(CN)(6) exhibits reversible voltammetric peaks at it. A voltammetric study of promethazine revealed that promethazine exhibits a sensitive anodic peak in pH 6.7 buffer solutions. Under the optimized conditions, the peak current is linearly related to the promethazine concentration in the range of 5.0 x 10(-8) - 5.0 x 10(-5) M. A 5 mu M promethazine solution is measured successively for ten times with the same electrode, the relative standard deviation ( RSD) of peak current is 1.7%. The promethazine content in a Chinese medicine (i.e. Complex Reserpine) is determined. The result is in accordance with the declared value, and the recoveries are 96.1 - 104%.

引用

页码：27 / 33

页数：7

共 24 条

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