| Title: | Vacuum ultraviolet absorption spectroscopy in combination with comprehensive two-dimensional gas chromatography for the monitoring of volatile organic compounds in breath gas: A feasibility study |
| Author(s): | Gruber B; Groeger T; Harrison D; Zimmermann R; |
| Address: | "Joint Mass Spectrometry Centre, Comprehensive Molecular Analytics, Helmholtz Zentrum Munchen, Ingolstadter Landstr. 1, 85764 Neuherberg, Germany; Joint Mass Spectrometry Centre, Chair of Analytical Chemistry, University of Rostock, Dr. Lorenz Weg 1, 18059 Rostock, Germany. Joint Mass Spectrometry Centre, Comprehensive Molecular Analytics, Helmholtz Zentrum Munchen, Ingolstadter Landstr. 1, 85764 Neuherberg, Germany; Joint Mass Spectrometry Centre, Chair of Analytical Chemistry, University of Rostock, Dr. Lorenz Weg 1, 18059 Rostock, Germany. Electronic address: thomas.groeger@helmholtz-muenchen.de. VUV Analytics, Inc., Austin, TX 78717, United States" |
| DOI: | 10.1016/j.chroma.2016.08.024 |
| ISSN/ISBN: | 1873-3778 (Electronic) 0021-9673 (Linking) |
| Abstract: | "Vacuum ultraviolet (VUV) absorption spectroscopy was recently introduced as a new detection system for one, as well as comprehensive two-dimensional gas chromatography (GCxGC) and successfully applied to the analysis of various analytes in several matrices. In this study, its suitability for the analysis of breath metabolites was investigated and the impact of a finite volume of the absorption cell and makeup gas pressure was evaluated for volatile analytes in terms of sensitivity and chromatographic resolution. A commercial available VUV absorption spectrometer was coupled to GCxGC and applied to the analysis of highly polar volatile organic compounds (VOCs). Breath gas samples were acquired by needle trap micro extraction (NTME) during a glucose challenge and analysed by the applied technique. Regarding qualitative and quantitative information, the VGA-100 is compatible with common GCxGC detection systems like FID and even TOFMS. Average peak widths of 300ms and LODs in the lower ng range were achieved using GCxGC-VUV. Especially small oxygenated breath metabolites show intense and characteristic absorption patterns in the VUV region. Challenge responsive VOCs could be identified and monitored during a glucose challenge. The new VUV detection technology might especially be of benefit for applications in clinical research" |
| Keywords: | "Breath Tests/instrumentation/*methods Chromatography, Gas/instrumentation/*methods Feasibility Studies Humans Limit of Detection Vacuum Volatile Organic Compounds/*analysis GCxGC Needle trap device (NTD) Needle trap micro extraction (NTME) Short chain fat;" |
| Notes: | "MedlineGruber, Beate Groeger, Thomas Harrison, Dale Zimmermann, Ralf eng Evaluation Study Netherlands 2016/08/23 J Chromatogr A. 2016 Sep 16; 1464:141-6. doi: 10.1016/j.chroma.2016.08.024. Epub 2016 Aug 11" |
