期刊
TALANTA
卷 258, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.talanta.2023.124436
关键词
Solid contact ion-selective electrode; Capsaicin derivative; Antifouling properties; Stability; Pb2+
An antifouling solid lead ion selective electrode was prepared by adding an environmentally friendly capsaicin derivative into the ion-selective membrane, which maintained the detection performance and exhibited excellent antifouling effect.
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/Pb2+-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/Pb2+-PISM (e.g., detection limit (1.9 x 10-7 M), response slope (28.5 +/- 0.8 mV/ decade), the response time (20 s), stability (8.6 +/- 2.9 mu V/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/Pb2+-PISM maintained stable antifouling properties, excellent potential response, and stability even after soaking in a high-concentration bacterial suspension for 7 days.
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