Modelling of toluene solid-phase microextraction for indoor air sampling.

摘要: Solid-phase microextraction (SPME) is a convenient and efficient sampling technique recently applied to indoor air analysis. We propose here theoretical model of the adsorption kinetics toluene on SPME fibre under static extraction conditions. discuss effects volume initial concentration analyte kinetics. This used estimate limits detection taking into account operating conditions calculate calibration curves. Results comparison with experimental data are encouraging: only 11% difference for curves 30% estimation limit detection. On basis this model, solid gradient in Carboxen coating was modelled Fick's second law diffusion unsteady-state mass-transfer mode. Mass from gas sample also investigated. It shown that limiting step process Thus, developed, allows better understanding future could be useful tool cheap time-saving development methods performance.