State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.
State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.
Talanta. 2022 Jan 1;236:122859. doi: 10.1016/j.talanta.2021.122859. Epub 2021 Sep 10.
The sensitivity and selectivity of electrochemical analysis are challenging due to the materials used for electrode modification as well as electrical conductivity, catalytic activity and recognition ability of the working electrode. In this work, a portable 3D-printed electrochemical electrode clamp was designed and applied in combination with the developed covalent organic framework (COF DQTP)-modified pencil graphite electrode (DQTP/PGE). The β-ketoenamine-linked COF DQTP synthesized by 1,3,5-triformylphloroglucinol (TP) and 2,6-diaminoanthraquinone (DQ) through solvothermal method is a porous crystalline with excellent conductivity and large periodic π-arrays, coupled with commercial available pencil graphite electrode to fabricate a disposable sensor for simultaneous determination of environmental endocrine disruptors bisphenol A and bisphenol S. The DQTP/PGE sensor exhibited high electrical conductivity and catalytic activity, and a good linearity was obtained in a range of 0.5-30 μM for two bisphenols with a detection limit of 0.15 μM (S/N = 3). Moreover, the sensor showed a reproducible and stable response over one month with negligible interference, and an accepted recovery with real food packaging samples.
电化学分析的灵敏度和选择性具有挑战性，这是由于用于电极修饰的材料、电极的电导率、催化活性和识别能力。在这项工作中，设计了一种便携式 3D 打印电化学电极夹，并与开发的共价有机框架（COF DQTP）修饰的铅笔石墨电极（DQTP/PGE）结合使用。通过溶剂热法合成的β-酮亚胺连接的 COF DQTP 是一种具有良好导电性和大周期性π阵列的多孔晶体，与市售的铅笔石墨电极相结合，制备了一种用于同时测定环境内分泌干扰物双酚 A 和双酚 S 的一次性传感器。DQTP/PGE 传感器表现出高导电性和催化活性，对于两种双酚，在 0.5-30 μM 的范围内获得了良好的线性，检测限为 0.15 μM（S/N=3）。此外，该传感器在一个月的时间内表现出可重复且稳定的响应，几乎没有干扰，并且对实际食品包装样品的回收率也可以接受。
