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

机译:使用带电子捕获探测器的气相色谱质量从农业土壤渗滤液中回收和检测

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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 style="white-space:nowrap;">°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.
机译:在这项研究中,据报道了一种分析方法,从粘土土壤中恢复有机氯农药。土壤是物理和化学表征。此外,使用填充柱和各种含水介质(H 2℃> O-MILLIQ,NaOH,HCl,SDS,Triton X-114,腐殖酸和乙腈)进行杀虫剂萃取。在Agilent Technologies 6890N气相色谱仪上分析渗滤液样品,在#AB002柱30.0m×250μm×0.25μm校准,25psi压力,流量2.9 ml / min,温度25 <跨度样式=“空白空间: noyrap;“>° c,超高纯度氦作为夹带气体和50分钟的洗脱时间。结果表明,用乙腈回收获得土壤洗涤中污染物的最高提取百分比: P , P ' - DDT(91.0% ); p , p ' - DDE(92.0%); P , P ' - DDD(96.0%);阿尔德林(98.6%);狄氏素(98.0%)。利用TRITON X-114,提取恢复是: P , P ' - DDT(63.0%); P , P ' - DDE(64.0%); p , p ' - DDD(65.0%); Aldrin(67.0%);司法素(72.0%)。本研究说明了SPME对土壤中有机氯农药常规分析的潜在适用性。

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