title: Use of simultaneous dual-probe microdialysis for the determination of pesticide residues in a jade plant (Crassula ovata).
abstract: A microdialysis application for the sampling of plant pesticide residues has been developed utilizing two probes with differing perfusate rates simultaneously inserted into symmetric components of a sampling system. A simple empirical equation is proposed to calculate analyte concentrations in a semi-solid matrix using two different dialysate concentrations. In vitro application yielded excellent correlations between the calculated and spiked concentrations. Subsequent in vivo application of this technique for the determination of pesticide distributions in leaves of a jade plant (Crassula ovata) indicated the utility of this approach in complex living matrices.
authors.affiliation: Department of Chemistry, University of Waterloo, Waterloo, ON, Canada N2L 3G1.
authors.forename: Simon Ningsun
authors.initials: SN
authors.lastname: Zhou
authors.forename: Ken D
authors.initials: KD
authors.lastname: Oakes
authors.forename: Mark R
authors.initials: MR
authors.lastname: Servos
authors.forename: Janusz
authors.initials: J
authors.lastname: Pawliszyn
mesh_terms: D002851:Chromatography, High Pressure Liquid; D029627:Crassulaceae / Q000737:chemistry*; D004784:Environmental Monitoring / Q000379:methods; D017022:Flow Injection Analysis; D017551:Microdialysis / Q000379:methods*; D010573:Pesticide Residues / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D010573:Pesticide Residues; D012989:Soil Pollutants