结晶紫在导电碳黑糊电极上的伏安行为及其检测  

Voltammetric behaviors of crystal violet at a conductive black carbon paste electrode and its application to rapid detection

作　　者：谷孝磊 赵常志[1] 

机构地区：[1]青岛科技大学化学与分子工程学院,青岛266042

出　　处：《分析试验室》2014年第5期501-505,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金项目(21005086);山东省自然科学基金项目(ZR2011BQ029)资助

摘　　要：结晶紫（cv）在导电碳黑糊电极（CCBPE）上具有灵敏的伏安响应，实验对其氧化还原机理进行了推导，结果表明：以pH8．0的B·R缓冲液为支持电解质，CV发生2电子转移的不可逆氧化，过程受吸附控制。在富集时间、富集电位、pH等影响因子得到优化情况下，其半微分一脉冲伏安扫描氧化峰值与其浓度在0．03～1．30~mol／L范围内呈线性，检出限为10nmol／L。据此建立了CV的电化学快检方法，并应用于淡水渔业水体中痕量CV的测定，平均回收率为97．1％。Crystal violet （CV） displays sensitive vohammetric responses at a the conductive carbon black paste electrode （CCBPE）. Herein the redox mechanism of CV on the CCBPE was studied. In the Britton-Robinson buffer solution of pH 8.0, an irreversible and adsorption-controlled oxidation reaction with 2 electrons participated occurs. After the experimental parameters, including accumulation time, accumulation potential, pH of supporting electrolyte etc. , were optimized, it was found that the semi-differential pulse voltammetric anodic peak value （ip＇,） of CV is proportional to its concentration in the range of 0. 03 ~ 1.30 ~mol/L with a detection limit of 10nmol/L （S/N --3）. Then, a rapid method was developed and applied in detecting trace amount of CV quantitatively in real samples from freshwater fisheries environment with satisfactory results （average recovery 97. 1% ）.

关 键 词：结晶紫 伏安法 快检 导电碳黑糊电极 渔业环境检测 

分 类 号：O657.1[理学—分析化学]