Characterization of the yerba mate (Ilex paraguariensis) volatile fraction using solid‐phase microextraction‐comprehensive 2‐D GC‐MS

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Abstract
The present research is focused on the use of a solid‐phase microextraction‐comprehensive 2‐D GC methodology, in the analysis of the volatile fraction of yerba mate. Yerba mate is used for the generation of a tea‐like beverage, widely consumed in South America. A rapid‐scanning quadrupole mass spectrometer (qMS), employed as a detection system and operated at a 25 Hz scanning frequency, supplied high‐quality mass spectra. The effectiveness of the 3‐D comprehensive 2‐D GC‐qMS experiment was compared to that of GC‐qMS analysis on the same sample. Peak identification, in both applications, was achieved through MS library matching, with the support of linear retention index data. Apart from a great increase in the number of analytes separated (approx. by a factor of 5) and identified (approx. by a factor of 3.5), the comprehensive 2‐D GC‐qMS approach enabled the determination of a high number of hazardous contaminants (aliphatic hydrocarbons, polycyclic aromatic hydrocarbons, and plasticizers), barely visible in the GC‐qMS analysis.
Funding Information
  • Italian Ministry for the University and Research (PNR 2005-2007 Project n. RBIP06SXMR)

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