Electrochemical Organophosphorus Pesticide Detection Using Nanostructured Gold-Modified Electrodes
In this study, nanostructured gold was successfully prepared on a bare Au electrode using the electrochemical deposition method. Nanostructured gold provided more exposed active sites to facilitate the ion and electron transfer during the electrocatalytic reaction of organophosphorus pesticide (meth...
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| Format: | Article |
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MDPI AG
2022-12-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/24/9938 |
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| author | Han-Wei Chang Chien-Lin Chen Yan-Hua Chen Yu-Ming Chang Feng-Jiin Liu Yu-Chen Tsai |
| author_facet | Han-Wei Chang Chien-Lin Chen Yan-Hua Chen Yu-Ming Chang Feng-Jiin Liu Yu-Chen Tsai |
| author_sort | Han-Wei Chang |
| collection | DOAJ |
| description | In this study, nanostructured gold was successfully prepared on a bare Au electrode using the electrochemical deposition method. Nanostructured gold provided more exposed active sites to facilitate the ion and electron transfer during the electrocatalytic reaction of organophosphorus pesticide (methyl parathion). The morphological and structural characterization of nanostructured gold was conducted using field-emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD), which was further carried out to evaluate the electrocatalytic activity towards methyl parathion sensing. The electrochemical performance of nanostructured gold was investigated by electrochemical measurements (cyclic voltammetry (CV) and differential pulse voltammetry (DPV)). The proposed nanostructured gold-modified electrode exhibited prominent electrochemical methyl parathion sensing performance (including two linear concentration ranges from 0.01 to 0.5 ppm (R<sup>2</sup> = 0.993) and from 0.5 to 4 ppm (R<sup>2</sup> = 0.996), limit of detection of 5.9 ppb, excellent selectivity and stability), and excellent capability in determination of pesticide residue in real fruit and vegetable samples (bok choy and strawberry). The study demonstrated that the presented approach to fabricate a nanostructured gold-modified electrode could be practically applied to detect pesticide residue in agricultural products via integrating the electrochemical and gas chromatography coupled with mass spectrometry (GC/MS-MS) analysis. |
| first_indexed | 2024-03-09T15:51:45Z |
| format | Article |
| id | doaj.art-9319b8554811495aa491950b5e4deccd |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T15:51:45Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-9319b8554811495aa491950b5e4deccd2023-11-24T17:57:48ZengMDPI AGSensors1424-82202022-12-012224993810.3390/s22249938Electrochemical Organophosphorus Pesticide Detection Using Nanostructured Gold-Modified ElectrodesHan-Wei Chang0Chien-Lin Chen1Yan-Hua Chen2Yu-Ming Chang3Feng-Jiin Liu4Yu-Chen Tsai5Department of Chemical Engineering, National United University, Miaoli 360302, TaiwanDepartment of Chemical Engineering, National Chung Hsing University, Taichung 40227, TaiwanDepartment of Chemical Engineering, National United University, Miaoli 360302, TaiwanDepartment of Chemical Engineering, National United University, Miaoli 360302, TaiwanDepartment of Chemical Engineering, National United University, Miaoli 360302, TaiwanDepartment of Chemical Engineering, National Chung Hsing University, Taichung 40227, TaiwanIn this study, nanostructured gold was successfully prepared on a bare Au electrode using the electrochemical deposition method. Nanostructured gold provided more exposed active sites to facilitate the ion and electron transfer during the electrocatalytic reaction of organophosphorus pesticide (methyl parathion). The morphological and structural characterization of nanostructured gold was conducted using field-emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD), which was further carried out to evaluate the electrocatalytic activity towards methyl parathion sensing. The electrochemical performance of nanostructured gold was investigated by electrochemical measurements (cyclic voltammetry (CV) and differential pulse voltammetry (DPV)). The proposed nanostructured gold-modified electrode exhibited prominent electrochemical methyl parathion sensing performance (including two linear concentration ranges from 0.01 to 0.5 ppm (R<sup>2</sup> = 0.993) and from 0.5 to 4 ppm (R<sup>2</sup> = 0.996), limit of detection of 5.9 ppb, excellent selectivity and stability), and excellent capability in determination of pesticide residue in real fruit and vegetable samples (bok choy and strawberry). The study demonstrated that the presented approach to fabricate a nanostructured gold-modified electrode could be practically applied to detect pesticide residue in agricultural products via integrating the electrochemical and gas chromatography coupled with mass spectrometry (GC/MS-MS) analysis.https://www.mdpi.com/1424-8220/22/24/9938nanostructured goldmethyl parathionelectrocatalytic activityagricultural products |
| spellingShingle | Han-Wei Chang Chien-Lin Chen Yan-Hua Chen Yu-Ming Chang Feng-Jiin Liu Yu-Chen Tsai Electrochemical Organophosphorus Pesticide Detection Using Nanostructured Gold-Modified Electrodes Sensors nanostructured gold methyl parathion electrocatalytic activity agricultural products |
| title | Electrochemical Organophosphorus Pesticide Detection Using Nanostructured Gold-Modified Electrodes |
| title_full | Electrochemical Organophosphorus Pesticide Detection Using Nanostructured Gold-Modified Electrodes |
| title_fullStr | Electrochemical Organophosphorus Pesticide Detection Using Nanostructured Gold-Modified Electrodes |
| title_full_unstemmed | Electrochemical Organophosphorus Pesticide Detection Using Nanostructured Gold-Modified Electrodes |
| title_short | Electrochemical Organophosphorus Pesticide Detection Using Nanostructured Gold-Modified Electrodes |
| title_sort | electrochemical organophosphorus pesticide detection using nanostructured gold modified electrodes |
| topic | nanostructured gold methyl parathion electrocatalytic activity agricultural products |
| url | https://www.mdpi.com/1424-8220/22/24/9938 |
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