Optimization of a heart-cutting multidimensional gas chromatography-based method for the assessment of enantiomeric fractions of o,p′-DDT in environmental samples |
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Authors: | Juan Muñ oz-Arnanz,Carme Bosch,Pilar Fernandez,Joan O. Grimalt,Begoñ a Jimenez |
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Affiliation: | 1. CSIC, Institute of Organic Chemistry, Instrumental Analysis and Environmental Chemistry, Juan de la Cierva 3, Madrid 28006, Spain;2. CSIC, Institute of Environmental Assessment and Water Research, Jordi Girona 18-26, Barcelona 08034, Spain |
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Abstract: | The enantiomeric fractions present in soil samples may provide information useful in distinguishing recent inputs of DDT from past DDT pollution. In this study, a chromatographic procedure for the determination of the enantiomeric fractions of o,p′-DDT based on heart-cutting multidimensional gas chromatography was developed. The optimization carried out achieved low ratios of DDT degradation (<15%) in the chromatographic system. High selectivity and sensitivity in the detection of the target compounds, with a limit of detection as low as 2.1 pg μL−1, was reached. In addition, high degrees of repeatability (RSD < 2.0%) and reproducibility (RSD < 3.2%) were obtained for the enantiomeric fractions measured in analytical standards and soil samples. |
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Keywords: | Heart-cutting Multidimensional gas chromatography MDGC o,p&prime -DDT Enantiomeric fractions EF Soil pollution |
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