便携式电化学传感平台灵敏检测偶氮类染料日落黄和柠檬黄  

Portable Electrochemical Sensor for Sensitive Detection of Azo Dyes Sunset Yellow and Tartrazine

作　　者：常雪晴 王子棋 鲁理平[1] CHANG Xue-Qing;WANG Zi-Qi;LU Li-Ping(Beijing Key Laboratory of Regional Air Pollution Control,Faculty of Environment and Life,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学环境科学系,区域大气复合污染防治北京市重点实验室,北京100124

出　　处：《分析化学》2024年第1期62-71,共10页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(No.22276005);北京市卓越青年科学家计划项目(No.BJJWZYJH01201910005017)资助。

摘　　要：构建了一种聚蛋氨酸(p-Met)修饰的激光诱导石墨烯(LIG)电极(p-Met/LIG),与便携式电化学工作站和掌上电脑应用程序一体化集成,实现了现场同时检测环境水体中的偶氮染料日落黄(SY)和柠檬黄(Tz)。优化了激光加工参数,制备了导电性能最佳的传感界面;在LIG表面电聚合Met,提高了SY和Tz的电化学响应;通过将p-Met/LIG便携式电化学传感器、小型电化学工作站和掌上电脑应用程序一体化集成,搭建了便携式电化学传感平台用于检测SY和Tz。采用差分脉冲伏安法(DPV)测定两种染料,检测SY的线性范围为0.2~20μmol/L和20~100μmol/L,检出限低至0.001μmol/L;检测Tz的线性范围为0.3~40μmol/L和40~100μmol/L,检出限为0.005μmol/L。p-Met/LIG具有优良的抗干扰性能、稳定性和重现性。将此便携式传感平台用于实际水样检测,结果表明,此平台适用于实际环境水体中SY和Tz的即时现场检测。A polymethionine(p-Met)-modified laser-induced graphene(LIG)electrode was constructed and integrated with portable electrochemical workstations and handheld computer to achieve on-site,simultaneous detection of azo dyes sunset yellow(SY)and tartrazine(Tz)in environmental water.Firstly,the sensor interface with the best electrical conductivity was obtained by optimizing the laser processing parameters,and then the electrochemical responses of SY and Tz were improved by electropolymerization of methionine on the surface of LIG.Finally,a portable electrochemical sensor platform was built by connecting p-Met/LIG,a small electrochemical workstation and a handheld computer application program.Differential pulse voltammetry(DPV)was used to determine these two dyes.SY showed a good linear relationship in the concentration range of 0.2–20μmol/L and 20–100μmol/L,the detection limit was as low as 0.001μmol/L.Tz showed a good linear relationship in concentration range of 0.3–40μmol/L and 40–100μmol/L,and the detection limits was as low as 0.005μmol/L.p-Met/LIG also had excellent anti-interference performance and reproducibility.The portable electrochemical platform was applied to real-time detection of real water samples,and the results showed that the platform was expected to be applied in field detection of SY and Tz in real environmental water bodies.

关 键 词：激光诱导石墨烯 电化学传感器 便携式 偶氮染料 日落黄 柠檬黄 

分 类 号：O657.1[理学—分析化学] X832[理学—化学]