Multi-residue Methodologies for the Analysis of Non-polar Pesticides in Water and Sediment Matrices by GC–MS/MS
A multi-residue method for the analysis of non-polar pesticides by GC–MS/MS in water and sediment matrices has been successfully developed, including 33 and 27 compounds, respectively. Water analysis method is based on a classic liquid–liquid extraction with recoveries ranging between 39 and 102%, with RSDs lower than 13%, LODs of 0.42–15.2 ng L−1 and LOQs of 0.72–50.8 ng L−1. Sediment analysis method is based on a pressurized liquid extraction with recoveries ranging between 37 and 133%, RSDs lower than 18%, LODs of 0.01–0.16 ng g−1 dry weigth (dw) and LOQs of 0.02–0.54 ng g−1 dw. Reported LODs were lower than the maximum acceptable detection limits set by the EU Watch Lists for selected pesticides. Applicability of both methodologies has been evaluated in real water and sediment samples collected in Catalonian river basins reporting oxadiazon for the first time in sediments from Catalonian river basins with a range of n.d. to 382 ng g−1 dw and a mean concentration of 44.0 ng g−1 dw. The importance of the simultaneous evaluation of both water and sediment has been emphasised since ten out of the 15 detected pesticides in the sediments can pose a high risk to aquatic organisms according to the Risk Quotient (RQ) method. Further detailed work needs to be done to better understand and assess the environmental impact of pesticide-contaminated sediments on aquatic organisms.
| Main Authors: | , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Springer
2021-03-15
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| Subjects: | Water, GC–MS/MS, Multi-residue, Oxadiazon, Pesticides, Sediment, |
| Online Access: | http://hdl.handle.net/10261/239548 http://dx.doi.org/10.13039/501100004837 http://dx.doi.org/10.13039/501100003329 |
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