Open AccessA Simple and Efficient Method Employing Solid-Liquid Extraction with Low-Temperature Partitioning for the Determination/Monitoring of Pesticide Residues in Strawberries by GC/ECD
Author(s) -
Tiago de Jesus Guedes,
Fernanda Fernandes Heleno,
Marina de O. Amaral,
Nísia Andrade Villela Dessimoni Pinto,
José Humberto de Queiróz,
Daniele F. da Silva,
A.A. Silva
Publication year - 2014
Publication title -
journal of the brazilian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.337
H-Index - 70
eISSN - 1678-4790
pISSN - 0103-5053
DOI - 10.5935/0103-5053.20140135
Subject(s) - chromatography , extraction (chemistry) , pesticide , simple (philosophy) , pesticide residue , chemistry , environmental chemistry , process engineering , engineering , agronomy , epistemology , biology , philosophy
The indiscriminate use of pesticides in strawberries can often make this crop unfit for consumption. In this study, the method of solid-liquid extraction with low-temperature partitioning (SLE/LTP) coupled with gas chromatography with electron capture detection (GC/ECD) was optimized. The proposed analytical method was validated by the analysis of spiked blank matrix samples. Limits of detection (LOD) varied between 4 and 16 µg kg-1, whereas limits of quantification (LOQ) ranged from 13 to 47 µg kg-1. Good recoveries (79-111%) and precision values (< 15%) were obtained for all compounds in the target matrix. This method has been successfully applied to the analysis of residues of pesticides found in strawberries collected from seven farms in the High Jequitinhonha Valley (MG, Brazil). The results revealed the presence of azoxystrobin, chlorothalonil, difenoconazole and iprodione in the strawberry samples.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom