期刊
MICROCHIMICA ACTA
卷 189, 期 5, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-022-05297-3
关键词
Covalent organic framework; Carbon cloth; Ratiometric electrochemical sensor; Differential pulse voltammetry; Bisphenols; Beverage samples
资金
- National Natural Science Foundation of China [21976070, 22076067]
- Fundamental Research Funds for the Central Universities [JUSRP22003]
A novel ratiometric electrochemical sensor was developed using a carbon cloth electrode deposited with silver nanoparticles and drop-coated by covalent organic framework (COF-LZU1) for simultaneous determination of bisphenol A (BPA) and bisphenol S (BPS). The sensor exhibited a larger electrochemical active area, better reproducibility, and a wider linear range compared to traditional single-signal sensors, and showed excellent stability and anti-interference ability in real sample analysis.
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 pi-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 mu M with a limit of detection of 0.15 mu M. 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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