Journal
JOURNAL OF SEPARATION SCIENCE
Volume 34, Issue 13, Pages 1547-1554Publisher
WILEY-BLACKWELL
DOI: 10.1002/jssc.201000697
Keywords
Chromatographic structure; Comprehensive 2-D gas chromatography; Gas chromatography-mass spectrometry; Pineapple; Solid-phase microextraction
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Funding
- FAPESP (Foundation for Research Support of the State of Sao Paulo)
- CNPq (Brazilian National Council for Research and Technological Development)
- CAPES (Brazilian Ministry of Education Agency for Improvement of Graduate Personnel)
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Combining qualitative data from the chromatographic structure of 2-D gas chromatography with flame ionization detection (GC x GC-FID) and that from gas chromatography-mass spectrometry (GC/MS) should result in a more accurate assignment of the peak identities than the simple analysis by GC/MS, where coelution of analytes is unavoidable in highly complex samples (rendering spectra unsuitable for qualitative purposes) or for compounds in very low concentrations. Using data from GC x GC-FID combined with GC/MS can reveal coelutions that were not detected by mass spectra deconvolution software. In addition, some compounds can be identified according to the structure of the GC x GC-FID chromatogram. In this article, the volatile fractions of fresh and dehydrated pineapple pulp were evaluated. The extraction of the volatiles was performed by dynamic headspace extraction coupled to solid-phase microextraction (DHS-SPME), a technique appropriate for slurries or solid matrices. Extracted analytes were then analyzed by GC x GC-FID and GC/MS. The results obtained using both techniques were combined to improve compound identifications.
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