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https://repositorio.ufba.br/handle/ri/6220
metadata.dc.type: | Artigo de Periódico |
Title: | Development, validation and application of a SDME/GC-FID methodology for the multiresidue determination of organophosphate and pyrethroid pesticides in water |
Other Titles: | Talanta |
Authors: | Pinheiro, Anselmo de Souza Andrade, Jailson Bittencourt de |
metadata.dc.creator: | Pinheiro, Anselmo de Souza Andrade, Jailson Bittencourt de |
Abstract: | A single-drop microextraction (SDME) procedure was developed for the analysis of organophosphorus and pyrethroid pesticides in water by gas chromatography (GC) with flame ionization detection (GC-FID). The significant parameters that affect SDME performance, such as the selection of microextraction solvent, solvent volume, extraction time, and stirring rate, were studied and optimized using a tool screening factorial design. The limits of detection (LODs) in water for the four investigated compounds were between 0.3 and 3.0 μg L−1, with relative standard deviations ranging from 7.7 to 18.8%. Linear response data were obtained in the concentration range of 0.9–6.0 μg L−1 (λ-cyhalothrin), 3.0–60.0 μg L−1 (methyl parathion), 9.0–60.0 μg L−1 (ethion), and 9.0–30.0 μg L−1 (permethrin), with correlation coefficients ranging from 0.9337 to 0.9977. The relative recoveries for the spiked water ranged from 73.0 to 104%. Environmental water samples (n = 26) were successfully analyzed using the proposed method and methyl parathion presented concentration up to 2.74 μg L−1. The SDME method, coupled with GC-FID analysis, provided good precision, accuracy, and reproducibility over a wide linear range. Other highlights of the method include its ease of use and its requirement of only small volumes of both organic solvent and sample. |
Keywords: | Single-drop microextraction Organophosphorus Pyrethroids GC-FID SDME |
Publisher: | Elsevier |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/6220 |
Issue Date: | 15-Oct-2009 |
Appears in Collections: | Artigo Publicado em Periódico (Química) |
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(88)1-s2.0-S0039914009004238-main.pdf Restricted Access | 2,77 MB | Adobe PDF | View/Open Request a copy |
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