20.500.12556/DKUM-91424 Dimethoate detection through a fluorescent coumarin dye 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. organophosphate pesticide methylamine coumarin fluorescence detection dimethoate TICT twisted intramolecular charge transfer pesticidi detekcija pesticidov dimetoat organofosfatni pesticidi fluorescenčna kumarinska barvila fluorescenčna detekcija metilamin true false true Elsevier Angleški jezik Slovenski jezik https://www.sciencedirect.com/journal/microchemical-journal Članek v reviji 2024-12-20 10:58:35 2024-12-20 13:49:02 2024-12-21 03:14:34 0000-00-00 00:00:00 2024 0 0 str. 1-6, [article no.] 112205 Vol. 207 Dec. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-04-23 2024-11-14 2024-11-16 543.426 220023811 10.1016/j.microc.2024.112205 1095-9149 1-s2.0-S0026265X24023178-main.pdf 1-s2.0-S0026265X24023178-main.pdf 1 1295E17382CF8ACCBAAB20A097185E97 4bf35d3cccb12acc3eaa94f373547c2b6bf2b5d839e7a4a17e1b8c6615a90935 6cb51acf-bed0-11ef-a34d-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=187509 https://www.sciencedirect.com/science/article/pii/S0026265X24023178?dgcid=author 1 fb709dc2-beb8-11ef-a34d-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=187493 Fakulteta za strojništvo 0 0 0