The effect of cetyltrimethyl ammonium bromide on the electrochemical determination of thyroxine

被引：53
|
作者：
He, Q
Dang, XP
Hu, CG
Hu, SS [1 ]
机构：
[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China
[2] Qujjing Normal Coll, Dept Chem, Qujing 655000, Peoples R China
来源：
COLLOIDS AND SURFACES B-BIOINTERFACES | 2004年 / 35卷 / 02期
基金：
中国国家自然科学基金;
关键词：
cetyltrimethyl ammonium bromide (CTAB); thyroxine; surfactant; polyvinylpyrrolidone (PVP);
D O I：
10.1016/j.colsurfb.2004.03.001
中图分类号：
Q6 [生物物理学];
学科分类号：
071011 ;
摘要：
Electrochemical behavior of thyroxine at a polyvinylpyrrolidone modified carbon paste electrode in the presence of cetyltrimethyl ammonium bromide was described. Thyroxine underwent totally irreversible oxidation at this system and a well-defined peak at 0.42 V was obtained. The influence of various surfactants on the oxidation of thyroxine was examined by cyclic voltammetry. Chronocoulometry was also used to investigate the electrode process. In the range 2 x 10(-7) to 9 x 10(-6) mol/l, the thyroxine concentration was linear with the oxidation peak current and a low detection limit of 8 x 10(-8) mol/l was obtained for 5 min accumulation. (C) 2004 Published by Elsevier B.V.
引用
收藏
页码：93 / 98
页数：6
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