| Title: | Studies on the aroma of cupuassu liquor by headspace solid-phase microextraction and gas chromatography |
| Author(s): | de Oliveira AM; Pereira NR; Marsaioli A; Augusto F; |
| Address: | "Institute of Chemistry, State University of Campinas, CP 6154, 13084-971 Campinas, Sao Paulo, Brazil" |
| DOI: | 10.1016/j.chroma.2003.08.061 |
| ISSN/ISBN: | 0021-9673 (Print) 0021-9673 (Linking) |
| Abstract: | "Headspace solid-phase microextraction (HS-SPME) coupled to gas chromatography with ion trap mass spectrometric detection and with atomic emission detection (GC-AED) was employed to identify possible odor-impact volatile organic compounds in cupuassu (Theobroma grandiflorum Spreng) liquor, as well as to quantify alkylpyrazines present in these samples. SPME fibers coated with 100 microm polydimethylsiloxane (PDMS), 65 microm PDMS-divinylbenzene (DVB) and 75 microm Carboxen (CAR)-PDMS were tested, the later being chosen for the optimized extraction procedure. The principal compounds found in the sample headspace were 3-methylbutanal, dimethylsulfide, dimethyldisulfide, beta-linalool and several alkylpyrazines (notably tetramethylpyrazine). The procedure for quantitation of the alkylpyrazines, using GC-AED for their separation and detection, allowed the detection of microg g(-1) levels of the analytes in the samples, with acceptable precision (R.S.D. less than 10%)" |
| Keywords: | "Chromatography, Gas/*methods Malvaceae/*chemistry Odorants/*analysis Reproducibility of Results Volatilization;" |
| Notes: | "Medlinede Oliveira, Ana Maria Pereira, Nadia Rosa Marsaioli, Antonio Jr Augusto, Fabio eng Research Support, Non-U.S. Gov't Netherlands 2004/02/03 J Chromatogr A. 2004 Jan 30; 1025(1):115-24. doi: 10.1016/j.chroma.2003.08.061" |
