Air/polymer distribution coefficients for polycyclic aromatic hydrocarbons by solid-phase microextraction sampling.
Two methods to estimate distribution coefficients (K) between air and poly(dimethylsiloxane) (PDMS) coating of solid-phase microextraction (SPME) fibers for eight low molecular polycyclic aromatic hydrocarbons (PAHs) there are presented. The PDMS phases were used for determination of the coefficients according to equilibrium theory with help of a developed static calibration system (SCS). Another way to estimate the coefficients is based on the use of a linear relationship between the logarithm of the coefficients (log K) and linear temperature-programmed retention indexes (LTPRI) of the compounds without necessity to calibrate. The log K values for both of methods ranged from 5.2 (naphthalene) to 8.9 (pyrene) at 22 degrees C. Relative standard deviation (R.S.D.) of log K for each compound determined by static calibration was no more than 5.3%. R.S.D. of retention times for LTPRI indices did not exceed 0.28% for repeated injection. All experiments were implemented on a GC-MS system.
Kolár
Kamil
K
Faculty of Chemistry, Institute of Chemistry and Technology of Environmental Protection, Brno University of Technology, Purkynova 118, Brno 612 00, Czech Republic. kolar@fch.vutbr.cz
Ciganek
Miroslav
M
Malecha
Jirí
J
D000388:Air / Q000032:analysis*; D002138:Calibration; D011083:Polycyclic Compounds / Q000032:analysis*; D011108:Polymers / Q000737:chemistry*; D015203:Reproducibility of Results
D011083:Polycyclic Compounds; D011108:Polymers