METHOD FOR THE DETERMINATION OF 16 AGROCHEMICALS IN GROUNDWATER BY LIQUID CHROMATOGRAPHY COUPLED TO TRIPLE QUADRUPOLE MASS DETECTOR. DEVELOPMENT AND VALIDATION
Keywords:
Groundwater, agrochemicals, Matanza-Riachuelo Basin, quantitative research, validation studies as topic, Chromatography Liquid, Mass SpectrometryAbstract
The Environmental Toxicology Laboratory of the Cuenca Alta Néstor Kirchner Hospital (HCANK) in conjunction with the Direction of Health and Environmental Education (DSyEA) of the Matanza Riachuelo Basin Authority (ACUMAR), began the development and optimization of analytical methodologies in environmental samples, to estimate possible sources of population exposure to health-risk contaminants. Since the Upper Basin is an area of agricultural production, the presence of agrochemicals in groundwater is expected. This work aimed to develop and validate a quantitative method for the determination of Ametrine, Atrazine, Desethyl Atrazine, Desisopropyl Atrazine, Azoxystrobin, Carbendazim, Dimethoate, Epoxiconazole, Flurochloridone, Imazapyr, Imazamox, Imidacloprid, Linuron, Metsulfuron-methyl, Tebuconazole and Triasulfuron in groundwater samples. Ultra-performance liquid chromatography with triple quadrupole mass detector (UHPLC-MS/MS) and C18 column was used. Post-filtration blank and fortified waters were injected (10 µL). Following the guidelines of the United States Environmental Protection Agency, the following parameters were determined: linearity, selectivity, matrix effect, precision, veracity and limit of quantification. The behavior was linear between 0,10 and 1,00 µg/L for all analytes with no matrix effect, recovery percentages between 100 and 116%, standard deviations of 8 to 16%, and quantification limits of 0,10 µg /L. A method suitable for the proposed purposes was developed and validated.
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Copyright (c) 2024 María Maura Lopéz Gastón, Aristi Maria Elena, Franco Adrián Arriola, Lucía Ayelen Aragona, Beatriz Esther Itten, Edda Cristina Villamil Lepori
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