Versatile magnetic carbon nanotubes for sampling and pre concentration of pesticides in environmental water.
This article describes a simple, efficient, and versatile magnetic carbon nanotubes (MCNT) method for sampling and pre-concentration of pesticides in environmental water samples. The multi-walled magnetic carbon nanotubes were obtained by chemical deposition vapor (CVD) process. The MCNTs structures are formed of hydrophobic and hydrophilic fractions that provide great dispersion at any water matrix allowing simultaneously a high efficiency of pesticides sorption. Following the extraction, analytes were desorbed with minor amounts of solvent and analyzed by gas chromatography coupled mass spectrometry (GC/MS). The parameters amount of MCNTs used to extraction, desorption time, and desorption temperature were optimized. The method showed good linearity with determination coefficients between 0.9040 and 0.9733. The limits of detection and quantification were ranged between 0.51 and 2.29µgL-1and between 1.19 and 5.35µgL-1respectively. The recovery ranged from 79.9% to 111.6%. The method was applied to the determination of fifteen multiclass pesticides in real samples of environmental water collected in Minas Gerais, Brazil.
Universidade Federal de Minas Gerais, Departamento de Química, ICEx, Av. Antônio Carlos, 6627, 31270901 Belo Horizonte, MG, Brazil.
Frederico Hayala Fernandes
FHF
Barbosa
Universidade Federal de Minas Gerais, Departamento de Química, ICEx, Av. Antônio Carlos, 6627, 31270901 Belo Horizonte, MG, Brazil.
Helvécio Costa
HC
Menezes
Universidade Federal de Minas Gerais, Departamento de Química, ICEx, Av. Antônio Carlos, 6627, 31270901 Belo Horizonte, MG, Brazil.
Ana Paula
AP
de Carvalho Teixeira
University Toulouse, ENSIACET, UPS INP LCC, Lab Chim Coordinat, UPR 8241, CNRS, 4 Allee Emile Monso, BP 44362, F-31030 Toulouse, France.
Philippe
P
Serp
Universidade Federal de Minas Gerais, Departamento de Química, ICEx, Av. Antônio Carlos, 6627, 31270901 Belo Horizonte, MG, Brazil.
Vitor
V
Antipoff
Universidade Federal de Minas Gerais, Departamento de Química, ICEx, Av. Antônio Carlos, 6627, 31270901 Belo Horizonte, MG, Brazil. Electronic address: zenilda@ufmg.br.
Zenilda
Z
de Lourdes Cardeal
D000327:Adsorption; D001938:Brazil; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D057230:Limit of Detection; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010575:Pesticides / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D052616:Solid Phase Extraction / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification
D058185:Magnetite Nanoparticles; D037742:Nanotubes, Carbon; D010575:Pesticides; D014874:Water Pollutants, Chemical
Environmental water sampling; GC/MS; Magnetic carbon nanotubes; Pesticides