title: Optimisation of solid-phase microextraction of volatiles.
abstract: The results of a systematic study on the precision and repeatability of measurements of the headspace solid phase micro-extraction (SPME) with open-cap vials in combination with capillary gas chromatography in comparison with septum-sealed vials are reported. Benzene, toluene, ethylbenzene, and xylene isomers (BTEX) were used as the target analytes in the investigation of spiked water samples at concentration levels of 42.5 microg l(-1). The dependence of a sample volume versus peak area showed maximum SPME recovery. The influence of sample volume on the precision and the time of taking the sample on the losses of volatile analytes was examined.
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak Technical University, Bratislava.
authors.forename: Eva
authors.initials: E
authors.lastname: Matisová
authors.forename: Monika
authors.initials: M
authors.lastname: Medved'ová
authors.forename: Janka
authors.initials: J
authors.lastname: Vraniaková
authors.forename: Peter
authors.initials: P
authors.lastname: Simon
mesh_terms: D006838:Hydrocarbons / Q000737:chemistry / Q000302:isolation & purification*; D015203:Reproducibility of Results; D014835:Volatilization
chemical_list: D006838:Hydrocarbons