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Journal of Analytical Methods in Chemistry
Volume 2016 (2016), Article ID 7058709, 11 pages
http://dx.doi.org/10.1155/2016/7058709
Research Article

A Simple and Quick Method for the Determination of Pesticides in Environmental Water by HF-LPME-GC/MS

1Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627-31270901 Belo Horizonte, MG, Brazil
2Universidade Federal de São João Del Rei, Avenida Sebastião Gonçalves Coelho 400, Chanadour, 35501-296 Divinópolis, MG, Brazil

Received 10 May 2016; Revised 18 August 2016; Accepted 1 September 2016

Academic Editor: Yolanda Moliner Martínez

Copyright © 2016 Helvécio C. Menezes et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper describes a simple and quick method for sampling and also for carrying out the preconcentration of pesticides in environmental water matrices using two-phased hollow fiber liquid phase microextraction (HF-LPME). Factors such as extraction mode, time, solvents, agitation, and salt addition were investigated in order to validate the LPME method. The following conditions were selected: 6 cm of polypropylene hollow fiber, ethyl octanoate as an acceptor phase, and extraction during 30 min under stirring at 200 rpm. The optimized method showed good linearity in the range of 0.14 to 200.00 μg L−1; the determination coefficient () was in the range of 0.9807–0.9990. The LOD ranged from 0.04 μg L−1 to 0.44 μg L−1, and LOQ ranged from 0.14 μg L−1 to 1.69 μg L−1. The recovery ranged from 85.17% to 114.73%. The method was applied to the analyses of pesticides in three environmental water samples (a spring and few streams) collected in a rural area from the state of Minas Gerais, Brazil.