title: Optimization of a heart-cutting multidimensional gas chromatography-based method for the assessment of enantiomeric fractions of o,p'-DDT in environmental samples.
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 microL(-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.
authors: Consejo Superior de Investigaciones Cientificas, Institute of Organic Chemistry, Instrumental Analysis and Environmental Chemistry, Juan de la Cierva 3, Madrid, Spain.
authors: Juan
authors: J
authors: Muñoz-Arnanz
authors: Carme
authors: C
authors: Bosch
authors: Pilar
authors: P
authors: Fernandez
authors: Joan O
authors: JO
authors: Grimalt
authors: Begoña
authors: B
authors: Jimenez
mesh_terms: D002138:Calibration; D002849:Chromatography, Gas / Q000295:instrumentation*; D003634:DDT / Q000032:analysis*; D004583:Electrons; D010575:Pesticides / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D013237:Stereoisomerism
chemical_list: D010575:Pesticides; D012989:Soil Pollutants; D003634:DDT