Ratiometric electrochemical analysis on a flexibly-fabricated vibratory electrode module for reliable and selective determination of imidacloprid
| Autor: | Zhiyu Chen, Jiyong Shi, Chao Liu, Wen Zhang, Xiaoou Wei, Han Zhang, Xin Wang, Xiaobo Zou |
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| Rok vydání: | 2021 |
| Předmět: |
Detection limit
Prussian blue Materials science Reference current Metals and Alloys Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Linear range chemistry Electrode Materials Chemistry Electrical and Electronic Engineering 0210 nano-technology Vibration motor Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 329:129228 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2020.129228 |
| Popis: | Excessively-used imidacloprid (IMI) leads to considerable pollutions. Feasible and reliable IMI detections are in great need. Therefore, we introduce the ratiometric IMI analysis on a flexibly-fabricated vibratory electrode module. In this system, β-cyclodextrin is chosen as a supramolecular recognizer to capture IMI, and Prussian blue (PB) acts as an internal reference. The reference current (IPB) presents remarkable stability with different IMI concentrations, while shows an identical fluctuant tendency to IMI current (IIMI) against interferences. The ratiometric readout (IIMI/IPB) is proven to be a more reliable indicator to quantize IMI. The as-fabricated sensor integrates a tri-electrode system and a vibration motor to improve IMI adsorption. The flexible module is prepared following well-proven industrial techniques of flexible print circuit. Fabrications and modifications of the sensor are morphologically examined. Synergistic characteristics in the ratiometric analysis are validated and optimized with electrochemical methods. Under optimum conditions, vibration-enhanced determinations are applied to laboratory and natural samples. Detection limit and linear range are well found as 6.1 × 10−8 mol L-1 and 2 × 10-7–1.2 × 10-4 mol L-1, respectively. The applicability for the natural samples is further validated with recovery tests and certified HPLC. Given this, this method can be treated as a promising tool for IMI determination in broad sources. |
| Databáze: | OpenAIRE |
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