摘要
本文提出了以十六烷基三甲基溴化铵(CTAB)修饰碳糊电极直接测定苯酚的电化学方法。在pH=8.0的0.1mol·L-1磷酸盐缓冲溶液中,苯酚在+0.63V出现一个灵敏的氧化峰,其峰电流与苯酚浓度在4.0×10-7~5.0×10-5mol·L-1之间呈线性关系,检出限为5.0×10-8mol·L-1。本文对CTAB对苯酚氧化的增敏机理进行了探讨。该电极用于工业废水中苯酚的检测,取得了满意的结果。
A new method for the determination of phenol with a CTAB modified carbon paste electrode was developed in this work. When the electrode potential swept from 0.20 to +1.00 V, a sensitive oxidation peak of phenol appeared at +0.63 V in 0.1 mol L^(-1) phosphate buffer (pH 8.0). The oxidation peak current had a linear relationship with phenol concentration in the range of 4.0×10^(-7)~(5.0)×10^(-5 )mol·L^(-1) and a low detection limit of 5.0×10^(-8) mol·L^(-1) was obtained (S/N=3). Mechanism for the electrochemical-oxidation of phenol and the enhancement effect of CTAB were investigated. This electrode was applied to the determination of phenol in industrial wastewater and the result was satisfactory.
出处
《分析科学学报》
CAS
CSCD
2005年第1期54-56,共3页
Journal of Analytical Science
关键词
苯酚
十六烷基三甲基溴化铵
碳糊电极
线性扫描伏安法
电化学检测
Phenol
) Cetyltrimethyl ammonium bromide
Carbon paste electrode
Linear sweep voltammetry
Electrochemical detection