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Studies on the aroma of maté ( Ilex paraguariensis St. Hil.) using headspace solid‐phase microextraction
Author(s) -
Araújo Hiram Costa,
Lacerda Maria Elisa Gonçalves,
Lopes Daíse,
Bizzo Humberto Ribeiro,
Kaplan Maria Auxiliadora Coelho
Publication year - 2007
Publication title -
phytochemical analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 72
eISSN - 1099-1565
pISSN - 0958-0344
DOI - 10.1002/pca.1002
Subject(s) - chemistry , solid phase microextraction , hexanal , aroma , chromatography , divinylbenzene , mass spectrometry , gas chromatography–mass spectrometry , ionone , extraction (chemistry) , gas chromatography , organic chemistry , food science , styrene , copolymer , polymer
Abstract Volatile and semi‐volatile components of maté ( Ilex paraguariensis St. Hil.) were analysed by headspace solid‐phase microextraction (HS‐SPME) coupled to gas chromatography and mass spectrometry. Five SPME fibres coated separately with 100 µm poly(dimethylsiloxane) (PDMS), 65 µm PDMS–divinylbenzene (DVB), 70 µm carbowax (CW)–DVB, 85 µm carboxen (CAR)–PMDS or 50/30 µm DVB–CAR, were tested. Seventy compounds were identified in the sample headspace, including propanal, ( E )‐2‐pentenal, hexanal, ( E )‐2‐hexenal, 6‐methyl‐5‐hepten‐2‐one, ( E , Z )‐2,4‐heptadienal, ( E , E )‐2,4‐heptadienal, ( E , Z )‐3,5‐octadien‐2‐one, β ‐cyclocitral, 3‐ethyl 4‐methyl‐(1 H )‐pyrrole‐2,5‐dione, α ‐ionone, geranylacetone, β ‐ionone, dihydroactinidiolide and caffeine. Extraction parameters such as temperature, time and sample mass were studied and optimized. The best conditions for trapping volatile and semi‐volatile compounds were obtained using a DVB–CAR fibre at 80°C for 60 min with a sample mass starting from 100 mg in a vial of 4 mL. Copyright © 2007 John Wiley & Sons, Ltd.