Modified semi-rotating cryogenic modulator for comprehensive two-dimensional gas chromatography |
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Authors: | Minna Kallio Matti Jussila Päivi Raimi Tuulia Hyötyläinen |
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Affiliation: | (1) Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland |
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Abstract: | A previously constructed semi-rotating cryogenic modulator was modified for comprehensive two-dimensional gas chromatography (GC×GC). The retention time repeatability was improved by replacing the modulator control program unit with a new system. Peak widths obtained with the modified modulator were comparable with those obtained with the previous modulator and other modulator types. The modulator was easy to construct and it can be installed in any commercial GC system. The constructed GC×GC–FID system and data obtained by gas chromatography–mass spectrometry (GC–MS) were used for identification of unknowns in forest aerosol samples. Figure A semi-rotating cryogenic modulator in which modulation is based on two-step cryogenic trapping with continuously flowing carbon dioxide has been developed for comprehensive two-dimensional gas chromatography |
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Keywords: | Comprehensive two-dimensional gas chromatography GC×GC Cryogenic modulator Modulation Organic aerosols |
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