三甲胺在碳糊电极上的电化学行为及其测定  

Electochemical Behaviors of Trimethylamine on Carbon Paste Electrode and its Detection

作　　者：王曼霞[1] 魏乃林 刘君[3] 

机构地区：[1]山东出入境检验检疫局,山东青岛266000 [2]青岛出入境检验检疫局,山东青岛266000 [3]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《广州化工》2013年第10期143-145,共3页GuangZhou Chemical Industry

基　　金：山东出入境检验检疫局科研项目(No:SK201070)

摘　　要：采用循环伏安法研究了三甲胺在碳糊电极上的电化学氧化行为,在0.1 mol/L KCl溶液中三甲胺在+0.861 V(vs.SCE)出现一个氧化峰。考察了支持电解质用量、扫描速率等条件对三甲胺电化学氧化信号的影响,求解电化学反应相关参数。利用示差脉冲伏安法对三甲胺进行了检测,其氧化峰电流与浓度在4.0×10-4～0.1 mol/L范围内呈良好的线性关系,检测限为3.12×10-4 mol/L(3σ)。Electrochemical behaviors of trimethylamine （TMA） were carefully investigated by cyclic voltammetry on a carbon paste electrode （ CPE ） in a 0. 1 mol/L KCl solution. Under the selected conditions, a single well - defined irreversible oxidation peak appeared at ＋ 0. 861 V （vs. SCE）, which could be attributed to the electrooxidation of TMA on the CPE. TMA exhibited a adsorption - controlled electrochemical process and the electrochemical parameters were calculated. The oxidation peak current was proportional to TMA concentration in the range from 4.0 × 10^-4 mol/L to 0. 1 mol/L with the detection limit as 3.12 × 10^-4 mol/L（3σ） by differential pulse vohammetry.

关 键 词：碳糊电极 三甲胺 循环伏安法 示差脉冲伏安法 

分 类 号：O65[理学—分析化学]