检出限
双酚A
电化学
电化学气体传感器
双酚S
共价键
支撑电解质
电解质
吸附
玻璃碳
化学
线性范围
纳米化学
共价有机骨架
碳纤维
再现性
电极
材料科学
色谱法
循环伏安法
有机化学
复合数
环氧树脂
物理化学
复合材料
作者
Yuehong Pang,Yiying Wang,Xiaofang Shen,Jin-Yu Qiao
标识
DOI:10.1007/s00604-022-05297-3
摘要
A novel ratiometric electrochemical sensor was developed based on a carbon cloth electrodeposited with silver nanoparticles and drop-coated by covalent organic framework (COF-LZU1) for simultaneous determination of bisphenol A (BPA) and bisphenol S (BPS). Carbon cloth exhibited a significantly larger electrochemical active area than common glassy carbon electrodes (27.5 times). Silver nanoparticles not only provided a stable reference signal but also enhanced electroactivity for the oxidation of BPA and BPS. COF-LZU1 with good adsorption performance and large periodic π-arrays promoted the enrichment of BPA and BPS to further increase the current response. Compared with the traditional single-signal electrochemical sensor, the developed ratiometric sensor exhibited better reproducibility and a wider linear range for BPA and BPS from 0.5 to 100 μM with a limit of detection of 0.15 μM. Furthermore, the developed sensor showed excellent stability and superior anti-interference ability. The real sample analysis for BPA and BPS has been successfully carried out in mineral water, electrolyte drink, tea, juice, and beer with recoveries of 88.3-111.7%. The developed ratiometric sensor is expected to be a candidate for the preparation of other electrochemical sensors and the analysis of additional practical samples.
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