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Pesticide residues and transformation products in groundwater from a Spanish agricultural region on the Mediterranean Coast

2008; Taylor & Francis; Volume: 88; Issue: 6 Linguagem: Inglês

10.1080/03067310701724772

1029-0397

Félix Hernández, José M. Marín, Óscar J. Pozo, Juan V. Sancho, Francisco J. López, Ignacio Morell,

Pharmaceutical and Antibiotic Environmental Impacts

Abstract An overview is given on the presence and changes over time of pesticide residues in groundwater from the Valencia region, one of the most important citrus cultivation sites of southern Europe. A multiresidue LC-MS/MS method was applied for the screening of around 50 pesticides in 75 water samples collected during 2000. The herbicides simazine, terbuthylazine, bromacil, terbumeton, and diuron were the most frequently detected compounds. On the basis of compounds detected in these samples, another method that focused on 30 herbicides and relevant transformation products (TPs) was developed and applied to around 80 water samples collected during 2003. Simazine was the most frequently found compound followed by several triazine metabolites. Data for this paper show the vulnerability of groundwater in this area to herbicide applications and illustrate the importance of including pesticide TPs in environmental monitoring programmes, as four out of the five compounds most frequently detected were pesticide TPs. Keywords: pesticidestransformation productswater-pollution monitoringliquid chromatographytandem mass spectrometry Acknowledgements The authors are very grateful to the SCIC of the University of Jaume I for using the LC-MS equipment. This work has been developed under financial support from the Spanish Ministry of Science and Technology (Ref. BQU 2003-02685 and Ref. REN 2002-01818).