| Title: | Dimethoate detection through a fluorescent coumarin dye |
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| Authors: | ID Donà, Edoardo (Author)
ID Mohr, Gerhard J. (Author)
ID Lobnik, Aleksandra (Author) |
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| Files: |  1-s2.0-S0026265X24023178-main.pdf (1,77 MB)
MD5: 1295E17382CF8ACCBAAB20A097185E97
 https://www.sciencedirect.com/science/article/pii/S0026265X24023178?dgcid=author
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FS - Faculty of Mechanical Engineering
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| Abstract: | In this study, we present a straightforward and innovative approach utilizing a coumarin fluorescent dye for the detection of dimethoate in green tea. Initially, the pesticide undergoes hydrolysis in a NaOH solution, yielding our target analyte, methylamine. Following neutralization to pH 9, methylamine reacts with the dye in CH3CN for 20 min. After a careful optimization, we achieved an outstanding linear correlation (R2 = 0.999) for dimethoate, spanning concentrations from 7.8 to 292 µg/L and LOD of 3.2 µg/L. Moreover, we successfully detected dimethoate in green tea, with a recovery of 95.4% (σ = 5.7%). Organophosphates pesticides (OPs), which dimethoate is one of the most used, pose a significant threat due to their toxicity upon both high direct exposure and prolonged low-level exposure, which has been linked to cancer. Therefore, the development of a detection method that is both selective and sensitive is imperative for safeguarding both the population and the environment. This method effectively addresses the stability challenges encountered by enzyme-based fluorescent sensors, thereby opening new avenues for the detection of organophosphate pesticides. |
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| Keywords: | organophosphate pesticide, methylamine, coumarin, fluorescence detection, dimethoate, TICT, twisted intramolecular charge transfer |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 23.04.2024 |
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| Article acceptance date: | 14.11.2024 |
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| Publication date: | 16.11.2024 |
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| Publisher: | Elsevier |
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| Year of publishing: | 2024 |
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| Number of pages: | str. 1-6, [article no.] 112205 |
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| Numbering: | Vol. 207 |
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| PID: | 20.500.12556/DKUM-91424  |
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| UDC: | 543.426 |
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| ISSN on article: | 1095-9149 |
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| COBISS.SI-ID: | 220023811 |
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| DOI: | 10.1016/j.microc.2024.112205 |
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| Publication date in DKUM: | 20.12.2024 |
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| Views: | 214 |
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| Downloads: | 23 |
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| Metadata: |    |
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| Categories: | Misc.
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