Title: Reath-by-breath analysis of banana aroma by proton-transfer-reaction mass-spectrometry
Authors : Mayr, Dagmar
Maerk, Tilmann
Lindinger, Werner
Brevard, Hugues
Yeretzian, Chahan
Published in : International journal of mass spectrometry
Pages : 743
Pages to: 756
Publisher / Ed. Institution : Wiley
Publisher / Ed. Institution: Chichester
Issue Date: 2003
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Coffee; Aroma
Subject (DDC) : 664: Food technology
Abstract: We report on the in vivo breath-by-breath analysis of volatiles released in the mouth during eating of ripe and unripe banana. The air exhaled through the nose, nosespace (NS), is directly introduced into a proton transfer reaction mass spectrometer and the time-intensity profiles of a series of volatiles are monitored on-line. These include isopentyl and isobutyl acetate, two characteristic odour compounds of ripe banana, and 2E-hexenal and hexanal, compounds typical of unripe banana. Comparing the NS with the headspace (HS) profile, two differences are outlined. First, NS concentrations of some compounds are increased, compared to the HS, while others are decreased. This indicates that the in-mouth situation has characteristics of its own?mastication, mixing/dilution with saliva, temperature and pH - which modify the aroma relative to an HS aroma. Second, we discuss the temporal evolution of the NS. While 2E-hexenal and hexanal steadily increase in the NS during mastication of unripe banana, no such evolution is observed in volatile organic compounds (VOCs) while eating ripe banana. Furthermore, ripe banana shows high VOC concentrations in the swallow breath in contrast to unripe banana.
Departement: Life Sciences und Facility Management
Publication type: Article in scientific Journal
ISSN: 1076-5174
URI: https://digitalcollection.zhaw.ch/handle/11475/5462
Appears in Collections:Publikationen Life Sciences und Facility Management

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