离子液体中噻吩的电化学检测方法研究  

Electrochemical Detection of Thiophene in Ionic Liquid

作　　者：于洁 敖思琦 杨俏 田鹏 周婉秋 康艳红 YU Jie;AO Siqi;YANG Qiao;TIAN Peng;ZHOU Wanqiu;KANG Yanhong(College of Chemistry and Chemical,Shenyang Normal University,Engineering Technology Research Center of Catalysis for Energy and Environment,Major Platform for Science and Technology of the Universities in Liaoning Province,Key Laboratory for Separation and Analysis of Complex Systems,Shenyang 110034)

机构地区：[1]沈阳师范大学化学化工学院,辽宁省高校重大科技平台能源与环境催化工程技术研究中心,复杂体系的分离与分析重点实验室,辽宁沈阳110034

出　　处：《分析科学学报》2020年第2期291-294,共4页Journal of Analytical Science

基　　金：沈阳市科技计划(No.17-76-1-00);辽宁省教育厅重点实验室项目(No.622015066);辽宁省高等学校科技项目(No.LFW201706);国家自然科学基金(No.51271127)。

摘　　要：用电化学线性扫描伏安法(LSV)测定1-丁基-3-甲基咪唑六氟磷酸盐([BMIM]PF6)离子液体中噻吩的浓度。实验结果表明:在LSV方式下,用乙腈作为离子液体的稀释剂,且乙腈与1-丁基-3-甲基咪唑六氟磷酸盐离子液体的摩尔比为13∶5,在室温条件下,噻吩的浓度在1000~30000μg/g范围内时其浓度与溶出峰电流之间成线性关系,相关系数R^2=0.99,检出限为216.78μg/g。该检测噻吩的电化学方法简单快速,具有较宽的线性范围和较低的检出限,可以应用于1-丁基-3-甲基咪唑六氟磷酸盐离子液体中噻吩浓度的检测。Electrochemical linear scanning voltammetry(LSV)was used to determine the concentration of thiophene in 1-butyl-3-methylimidazolium hexafluorophosphate([BMIM]PF6)ionic liquid.The results showed that the molar ratio of acetonitrile to[BMIM]PF6 ionic liquid was 13∶5,when acetonitrile was used as diluent of ionic liquids.There was a linear relationship between thiophene concentration in the range of 1000-30000μg/g and the peak dissolution current at room temperature.The correlation coefficient was R^2=0.99,and the detection limit was 216.78μg/g.This electrochemical detection method for thiophene was simple and fast,with a wide linear range and a low detection limit,which could be applied to the detection of thiophene concentration in 1-butyl-3-methylimidazole hexafluorophosphate ionic liquid.

关 键 词：噻吩 离子液体 电化学分析 

分 类 号：O657.1[理学—分析化学]