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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