title: Semi-rotating cryogenic modulator for comprehensive two-dimensional gas chromatography.
abstract: A laboratory-made cryogenic modulator for comprehensive two-dimensional gas chromatography (GCxGC) was constructed and evaluated. Analytes were trapped with carbon dioxide and desorbed with heated GC oven air. The GCxGC system included a non-polar first-dimension column and a semi-polar second-dimension column connected to a flame ionisation detector. A laboratory-written Matlab-based program was used for the data analysis. Peak widths at half height for n-alkanes, obtained with use of new modulator, were at narrowest 60 ms.
authors.affiliation: Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland.
authors.forename: Minna
authors.initials: M
authors.lastname: Kallio
authors.forename: Tuulia
authors.initials: T
authors.lastname: Hyötyläinen
authors.forename: Matti
authors.initials: M
authors.lastname: Jussila
authors.forename: Kari
authors.initials: K
authors.lastname: Hartonen
authors.forename: Sami
authors.initials: S
authors.lastname: Palonen
authors.forename: Masahiko
authors.initials: M
authors.lastname: Shimmo
authors.forename: Marja-Liisa
authors.initials: ML
authors.lastname: Riekkola