JA0016 Multiresidue pesticides analysis in soils using modified QuEChERS with disposable pipette extraction and dispersive solid-phase extraction
来源:Journal of Chromatographic Science
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作者:Virg´ınia C. Fernandes
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发布时间: 2150天前
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1880 次浏览
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QuEChERS original method was modified into a new version for pesticides determination in soils. The QuEChERS method is based on liquid–liquid portioning with ACN and was followed by cleanup step using dispersive SPE and disposable pipette tips. Gas chromatographic separation with MS detection was carried out for pesticides quantification. The method was validated using recovery experiments for 36 multiclass pesticides. Mean recoveries of pesticides at each of the four spiking levels between 10–300 g/kg of soil ranged
from 70–120% for 26 pesticides with RSD values less than 15%. The method achieved low limit of detection less than 7.6 g/kg. Matrix effects were observed for 13 pesticides. Matrix effects were compensated by using matrix-matched calibration. The method was applied successfully using d-SPE or DPX in the analysis of the pesticides in soils from organic farming and integrated pest management.
from 70–120% for 26 pesticides with RSD values less than 15%. The method achieved low limit of detection less than 7.6 g/kg. Matrix effects were observed for 13 pesticides. Matrix effects were compensated by using matrix-matched calibration. The method was applied successfully using d-SPE or DPX in the analysis of the pesticides in soils from organic farming and integrated pest management.
1 Introduction
The increasing worldwide need for food demands a higher agricultural productivity, which can be achieved by a wide use of pesticides [1]. However, modern agricultural methods and technologies brought spectacular increases in food production, but not without high environmental costs. Some pesticides displayed high acute toxicity, mutagenic and carcinogenic effects as well as endocrine disruptor effects [2]. Soil is an important agricultural resource that has an ability to retain agro-chemicals including pesticides. The soil may be exposed to pesticides through direct application, accidental spillage, run-off from plant surfaces, or from incorporation of pesticide-contaminated plant materials. Once in soil,....
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The increasing worldwide need for food demands a higher agricultural productivity, which can be achieved by a wide use of pesticides [1]. However, modern agricultural methods and technologies brought spectacular increases in food production, but not without high environmental costs. Some pesticides displayed high acute toxicity, mutagenic and carcinogenic effects as well as endocrine disruptor effects [2]. Soil is an important agricultural resource that has an ability to retain agro-chemicals including pesticides. The soil may be exposed to pesticides through direct application, accidental spillage, run-off from plant surfaces, or from incorporation of pesticide-contaminated plant materials. Once in soil,....
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