Please use this identifier to cite or link to this item:
https://hdl.handle.net/10216/102916
Author(s): | Raquel Sousa Vera Homem José Luís Moreira Luís M. Madeira Arminda Alves |
Title: | Optimisation and application of dispersive liquid-liquid microextraction for simultaneous determination of carbamates and organophosphorus pesticides in waters |
Issue Date: | 2013 |
Abstract: | A very simple and sensitive method was developed for the simultaneous determination of carbamate and organophosphorus pesticides in water samples, using dispersive liquid-liquid microextraction (DLLME) coupled with gas chromatography-mass spectrometry (GC-MS). Carbofuran and chlorfenvinphos were used as model molecules in this study. The optimisation of some important DLLME parameters (type and volume of extraction and dispersive solvents, sample volume, extraction time, and use of NaCl) was performed using a design of experiments approach. Under optimised conditions of the DLLME methodology (500 mu L of methanol, 80 mu L of chlorobenzene, 10 mu L of aqueous sample, 4 minutes of vortexing and no salt addition), the calibration curve was linear in the concentration range of 0.1-250 mu g L-1 for carbofuran and 0.1-200 mu g L-1 for chlorfenvinphos. The limits of detection (LODs) were 0.04 mu g L-1 for the carbamate and 0.02 mu g L-1 for the organophosphorus pesticide. The proposed method was successfully applied to the analysis in river, mineral and tap water samples, yielding satisfactory results. |
Subject: | Outras ciências agrárias Other Agrarian Sciences |
Scientific areas: | Ciências agrárias::Outras ciências agrárias Agrarian Sciences::Other Agrarian Sciences |
URI: | https://hdl.handle.net/10216/102916 |
Related Information: | info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e a Tecnologia/Projectos de I&DT em Todos os Domínios Científicos/PTDC/AAC-AMB/101687/2008/Segurança química em sistemas de abastecimento de água/ACQUASAFE info:eu-repo/grantAgreement/COMISSÃO EUROPEIA/7.º Programa-Quadro de IDT/217976 /Security and decontamination of drinking water distribution systems following a deliberate contamination /SECUREAU |
Document Type: | Artigo em Revista Científica Internacional |
Rights: | restrictedAccess |
Appears in Collections: | FEUP - Artigo em Revista Científica Internacional |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
104781.pdf Restricted Access | Artigo original publicado | 583.51 kB | Adobe PDF | Request a copy from the Author(s) |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.