Title: Liquid-air partitioning of volatile compounds in coffee : dynamic measurements using proton-transfer-reaction mass spectrometry
Authors : Pollien, Philippe
Jordan, Alfons
Lindinger, Werner
Yeretzian, Chahan
Published in : International Journal of Mass Spectrometry
Volume(Issue) : 228
Issue : 1
Pages : 69
Pages to: 80
Publisher / Ed. Institution : Elsevier
Publisher / Ed. Institution: Amsterdam
Issue Date: 1-Aug-2003
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Partition coefficients; Coffee; Flavor
Subject (DDC) : 663: Beverage technology
Abstract: Recently we introduced a dynamic approach to determine Henry's law constants (HLCs) of volatile organic compounds (VOCs) in water, and applied it to a series organic compounds dissolved in pure water. Here, we first discuss a further development of the original approach such that it can be applied to complex liquid food systems (coffee). Second, we examine the impact of non-volatile constituents on the HLC. More specifically, we evaluate the impact of non-volatile coffee constituents on the HLC of 2-methylpropanal, 3- and 2-methylbutanal, dimethylsulfide, dimethyldisulfide and ethyl-2-methylbutyrate. Finally, we demonstrate that the concentration on the VOC in solution does not affect the HLC, over the investigated concentration range of 10−4 to 10 ppm.
Departement: Life Sciences und Facility Management
Publication type: Article in scientific Journal
DOI : 10.1016/S1387-3806(03)00197-0
ISSN: 1387-3806
URI: https://digitalcollection.zhaw.ch/handle/11475/5463
Appears in Collections:Publikationen Life Sciences und Facility Management

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