Pesticides Recovery and Detection from Agricultural Soil Leachates Using Gas Chromatography Masses with Electron Capture Detector  

作　　者：Lluvia Paola Medina-Armenta Gustavo Cruz-Jiménez Margarita Teutli-León Luis A. García de la Rosa Rossy Feria-Reyes 

机构地区：[1]Chemistry Department, Guanajuato University, Guanajuato, Mexico [2]Pharmacia Department, Guanajuato University, Guanajuato, Mexico [3]Engineering Department, Distinguished Autonomous University of Puebla, Puebla, Mexico [4]UPIG, Chemistry Department, National Polytechnic Institute, Guanajuato, Mexico

出　　处：《American Journal of Analytical Chemistry》2017年第10期605-616,共12页美国分析化学（英文）

摘　　要：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.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.

关 键 词：Leaching of ORGANOCHLORINE Compounds SURFACTANTS Desorption of PESTICIDES Packed Columns Soil Gas Chromatography-ECD 

分 类 号：O6[理学—化学]