DETERMINATION OF PESTICIDES IN RIVER SURFACE WATERS OF CENTRAL CHILE USING SPE-GC-MS MULTI-RESIDUE METHOD
| Autor: | M.S. Rodríguez-Cruz, Pablo Pedreros, María J. Sánchez-Martín, Roberto Urrutia, Eliseo Herrero-Hernández, María José Climent |
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| Přispěvatelé: | Ministerio de Economía y Competitividad (España), European Commission, Rodríguez-Cruz, M. Sonia, Sánchez-Martín, M. Jesús, Rodríguez-Cruz, M. Sonia [0000-0001-6748-3391], Sánchez-Martín, M. Jesús [0000-0002-8304-1232] |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
water pollution
010504 meteorology & atmospheric sciences Elution Simazine General Chemistry pesticides 010501 environmental sciences Pesticide 01 natural sciences chemistry.chemical_compound chemistry degradation products Water pollution agricultural activity Environmental chemistry Agricultural activities Environmental science Pyrimethanil Gas chromatography Gas chromatography–mass spectrometry Pesticides Surface water Degradation products 0105 earth and related environmental sciences |
| Zdroj: | Journal of the Chilean Chemical Society, Volume: 63, Issue: 2, Pages: 4023-4031, Published: JUN 2018 Digital.CSIC. Repositorio Institucional del CSIC instname Journal of the Chilean Chemical Society v.63 n.2 2018 SciELO Chile CONICYT Chile instacron:CONICYT |
| Popis: | 9 paginas, 5 tablas, 4 figuras. In areas with agricultural activity, the excessive use of pesticides can contaminate water resources. That is why a multi-residue method based on solid-phase extraction (SPE) and gas chromatography analysis coupled to mass spectrometry (GS-MS) was used to determine eleven pesticides and five degradation products in surface water of Central Chile. The parameters that can affect the efficiency of the SPE process were optimized considering the information available in bibliography. As in other studies, the best results were obtained when 500 mL of water was pre-concentrated using Oasis HLB polymer cartridges and acetone and acetonitrile were used as solvents for the elution. To ensure good quantification, matrix-matched standards were used, providing good linearity in the studied concentration range (0.10-1.5 μg L-1), with recovery percentages > 60%, precisions < 19% and quantification limits < 0.1 μg L-1. The surface water samples were collected at the end of summer and winter seasons, considering rivers, creeks and irrigation canals of Cachapoal River basin. A percentage > 87% of the pesticides analyzed in this research were detected in more than one sampled site in both seasons. The most ubiquitous compounds were desethylterbuthylazine (DET), pyrimethanil, cyprodinil and diazinon, and the compounds detected in highest concentration were simazine and degradation products derived from triazines. Las Cabras and Tahuilla irrigation canals presented the highest concentrations of pesticides. Significant differences were found in the total concentration of pesticides for sites sampled at the end of the summer and winter season This work was partly funded by the Government of Spain (MINECO/ FEDER UE) as part of Project AGL2015-69485-R. |
| Databáze: | OpenAIRE |
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