title: Single-jet, single-stage cryogenic modulator for comprehensive two-dimensional gas chromatography (GC x GC).
abstract: A simple, single-stage CO2 jet modulator has been designed, which cools only a single, ca. 10 mm long section of the front part of the second-dimension column of a comprehensive two-dimensional gas chromatographic (GC x GC) system. Direct heating by means of the GC oven air effects remobilization of the small fractions trapped upon eluting from the first-dimension column within a predetermined short period of time. Evaluation of the present modulator for the GC x GC separation of (very) polar flavour as well as non-polar compounds shows that the analytical performance of the single-stage modulator is closely similar to that of earlier reported, more complex, types of modulator.
authors.affiliation: Department of Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit, de Boelelaan 1083, 1081 HV Amsterdam, The Netherlands.
authors.forename: M
authors.initials: M
authors.lastname: Adahchour
authors.forename: J
authors.initials: J
authors.lastname: Beens
authors.forename: U A Th
authors.initials: UA
authors.lastname: Brinkman
mesh_terms: D005504:Food Analysis; D008401:Gas Chromatography-Mass Spectrometry / Q000295:instrumentation* / Q000379:methods; D006801:Humans