使用环境友好型辣椒素衍生物改善铅离子选择性电极的防污性能

Antifouling improvement in Pb ion selective electrodes by using an environmentally friendly capsaicin derivative.

作者信息

Liu Yanhua, Wang Xuan, Zeng Xianghua, Waterhouse Geoffrey I N, Jiang Xiaohui, Zhang Zhiming, Yu Liangmin

机构信息

Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266100, China.

School of Chemical Sciences, The University of Auckland, Auckland, 1142, New Zealand.

出版信息

Talanta. 2023 Jun 1;258:124436. doi: 10.1016/j.talanta.2023.124436. Epub 2023 Mar 11.

DOI:10.1016/j.talanta.2023.124436

PMID:36940573

Abstract

Biofouling is a critical issue for ion selective electrodes (ISE) in complex aqueous systems, seriously compromising the analytical performance of the electrodes (i.e., stability, sensitivity, and lifetime). Herein, an antifouling solid lead ion selective electrode (GC/PANI-PFOA/Pb-PISM) was successfully prepared by adding propyl 2-(acrylamidomethyl)-3,4,5-trihydroxy benzoate (PAMTB), an environmentally friendly capsaicin derivative, into the ion-selective membrane (ISM). The presence of PAMTB caused no loss in the detection performance of GC/PANI-PFOA/Pb-PISM (e.g., detection limit (1.9 × 10 M), response slope (28.5 ± 0.8 mV/decade), the response time (20 s), stability (8.6 ± 2.9 μV/s), selectivity and no water layer), whilst imparting an excellent antifouling effect with an antibacterial rate of 98.1% when the content of PAMTB in the ISM was 2.5 wt%. Further, GC/PANI-PFOA/Pb-PISM maintained stable antifouling properties, excellent potential response, and stability even after soaking in a high-concentration bacterial suspension for 7 days.

摘要

生物污染是复杂水体系中离子选择性电极（ISE）面临的一个关键问题，严重损害电极的分析性能（即稳定性、灵敏度和寿命）。在此，通过将一种环境友好的辣椒素衍生物2-(丙烯酰胺甲基)-3,4,5-三羟基苯甲酸丙酯（PAMTB）添加到离子选择性膜（ISM）中，成功制备了一种防污固体铅离子选择性电极（GC/PANI-PFOA/Pb-PISM）。PAMTB的存在并未导致GC/PANI-PFOA/Pb-PISM的检测性能下降（例如，检测限（1.9×10 M）、响应斜率（28.5±0.8 mV/decade）、响应时间（20 s）、稳定性（8.6±2.9 μV/s）、选择性且无水层），同时当ISM中PAMTB的含量为2.5 wt%时，赋予了优异的防污效果，抗菌率达98.1%。此外，即使在高浓度细菌悬浮液中浸泡7天后，GC/PANI-PFOA/Pb-PISM仍保持稳定的防污性能、优异的电位响应和稳定性。