Vibration-enhanced disposable electroanalytical platform for selective analysis of tryptophan in fruits based on molecular imprinting.

Autor: Cheng Y; School of Public Health, Nantong University, 9 Seyuan Rd., Nantong, Jiangsu, 226019, China., Tian DY; School of Public Health, Nantong University, 9 Seyuan Rd., Nantong, Jiangsu, 226019, China., Wang YH; School of Public Health, Nantong University, 9 Seyuan Rd., Nantong, Jiangsu, 226019, China., Liu W; National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China. Electronic address: liuwu@cemps.ac.cn., Huo XL; School of Public Health, Nantong University, 9 Seyuan Rd., Nantong, Jiangsu, 226019, China. Electronic address: hxl362349@ntu.edu.cn., Bao N; School of Public Health, Nantong University, 9 Seyuan Rd., Nantong, Jiangsu, 226019, China. Electronic address: ningbao@ntu.edu.cn., Wu ZQ; School of Public Health, Nantong University, 9 Seyuan Rd., Nantong, Jiangsu, 226019, China. Electronic address: zqwu@ntu.edu.cn.
Jazyk: angličtina
Zdroj: Analytica chimica acta [Anal Chim Acta] 2023 Oct 23; Vol. 1279, pp. 341853. Date of Electronic Publication: 2023 Sep 27.
DOI: 10.1016/j.aca.2023.341853
Abstrakt: Although electrochemical detection based on molecular imprinting polymers (MIP) could dramatically improve the selectivity, the procedure is time-consuming because of the essential incubation step. In addition, current MIP electrochemical detections were not suitable for analysis of microliter-level sample solutions, limiting their applications for real samples. This investigation aims at applying vibration to enhance efficiency of MIP electrochemical detection of 20 μL sample solutions. MIP analysis of Tryptophan (Trp) was used as the model with disposable MIP electrodes prepared by electrochemical polymerization of o-phenylenediamine on carbon ink coated on stainless steel sheets. The MIP electrode was integrated in a 3D-printed analytical device for vibration-enhanced electrochemical detection of Trp. Our results showed that this vibration-enhanced strategy could significantly increase electrochemical responses of Trp at the same incubation time. Such improvement might be attributed to the enhanced mass transfer at the surface of the working electrode brought by vibration. It needs to be emphasized that this strategy is suitable for analysis of sample solutions with the volume of microliters, which is superior to normal stirring in MIP electrochemical detection. Our approach could be successfully utilized for differentiation of Trp in different fruits, opening more opportunities for MIP electrochemical detection of real samples. The enhanced efficiency by vibration could pave foundation for extensive practical MIP detection of sample solutions at the level of microliters.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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