TITLE:
Pesticides Recovery and Detection from Agricultural Soil Leachates Using Gas Chromatography Masses with Electron Capture Detector
AUTHORS:
Lluvia Paola Medina-Armenta, Gustavo Cruz-Jiménez, Margarita Teutli-León, Luis A. García de la Rosa, Rossy Feria-Reyes
KEYWORDS:
Leaching of Organochlorine Compounds, Surfactants, Desorption of Pesticides, Packed Columns, Soil, Gas Chromatography-ECD
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.8 No.10,
October
24,
2017
ABSTRACT: In this
study, it is reported an analytical approach to recover
organochlorine pesticides from a clay soil. Soil was physical and chemically
characterized. Also pesticides
extraction was carried out using packed columns and various aqueous media (H2O-milliQ,
NaOH, HCl, SDS, Triton X-114, Humic acids and
Acetonitrile). The leachate samples were analyzed on an Agilent Technologies
6890N Gas Chromatograph with electron capture in a# AB002 Column 30.0 m × 250 μm × 0.25 μm calibrated, 25 psi pressure, flow
2.9 ml/min, temperature 25°C,
ultra-high purity Helium as the entrainment gas and an elution time of 50 min.
The results show that the highest extraction percentage of pollutants in the
soil washing was obtained with acetonitrile recovering: p, p’-DDT
(91.0%); p, p’-DDE (92.0%); p, p’-DDD (96.0%); aldrin
(98.6%); dieldrin (98.0%). With Triton X-114, the extractions recovery was: p, p’-DDT
(63.0%); p, p’-DDE (64.0%); p, p’-DDD
(65.0%); aldrin (67.0%); dieldrin
(72.0%). This study illustrates the potential Applicability of SPME for routine analysis of organochlorine
pesticides in soils.