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https://scholarhub.balamand.edu.lb/handle/uob/2340
Title: | Optimization of a DI-SPME-GC-MS/MS method for multi-residue analysis of pesticides in waters | Authors: | Jabali, Yasmine Millet, Maurice Hoz, Mervat El |
Affiliations: | Department of Civil and Environmental Engineering Department of Civil and Environmental Engineering |
Keywords: | Pesticides GC-MS/MS DI-SPME Abou Ali River |
Subjects: | Water--Analysis | Issue Date: | 2019 | Part of: | Microchemical journal | Volume: | 147 | Start page: | 83 | End page: | 92 | Abstract: | This paper discusses the optimization and validation of a complete and simple method for the simultaneous determination of 48 pesticides in water by combining direct immersion solid-phase micro-extraction (DI-SPME) and gas chromatography-ion trap tandem mass spectrometry (GC-ITMS/MS). For the extraction, the different SPME parameters were tested and optimized. As a result, the polyacrylate fiber (PA 85 μm) was selected in direct immersion mode; the extraction temperature was set to 60 °C with an extraction time of 45 min and a stirring speed of 500 rpm; the thermal desorption time of the fiber in the injector port was fixed to 10 min at 275 °C. Concerning the analysis, MS/MS parameters were optimized and figures of merit were compared. Later, the method was validated and showed good linearity in the concentration ranging from 0.05 to 100 μg L−1. The reproducibility of measurements expressed as the relative standard deviation (% RSD) was found to be satisfactory. Furthermore, the detection limits for all the compounds were between 0.001 and 0.458 μg L−1, except for methomyl and hexachlorobenzene (1.09 and 0.99 μg L−1 respectively). Finally, the proposed DI-SPME-GC–MS/MS method was tested successfully for water samples collected along the watershed of Abou Ali River (North Lebanon). |
URI: | https://scholarhub.balamand.edu.lb/handle/uob/2340 | DOI: | 10.1016/j.microc.2019.03.004 | Ezproxy URL: | Link to full text | Type: | Journal Article |
Appears in Collections: | Department of Civil and Environmental Engineering |
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