|Title:||Measuring partition coefficients of VOC's and their temperature dependence by dynamic stripping and Proton-Transfer Reaction Time-of-Flight Mass Spectrometry (PTR-ToF_MS)|
|Authors :||Wieland, Flurin|
Gloess, Alexia N.
|Proceedings:||Contributions : 5th International Conference on Proton Transfer Reaction Mass Spectrometry and ist Applications|
|Conference details:||5th International Conference on Proton Transfer Reaction Mass Spectrometry and ist Applications, Obergurgl, Austria, 26 January - 2 February 2011|
|Publisher / Ed. Institution :||Innsbruck University Press|
|Publisher / Ed. Institution:||Innsbruck|
|License (according to publishing contract) :||Licence according to publishing contract|
|Type of review:||Not specified|
|Subjects :||Henry law constant (hlc); Volatile organic compound (voc); Coffee; PTR-TOF-MS|
|Subject (DDC) :||664: Food technology|
|Abstract:||Air-water partition coefficients play a significant role in understanding processes like aroma release from food, for many environmental phenomena or in medical analysis (breath analysis). The equilibrium of gas dissolved in a liquid (e.g. water) can be described via Henry`s Law constant (HLC). We have developed and validated a dynamic approach using a stripping cell configuration coupled on-line to a PTR-ToF-MS to measure with high accuracy the HLC of VOCs. This methodology allows the rapid determination of water-air partition coefficients, even for molecules with low volatility, and over an extended temperature range (25-90°C).|
|Departement:||Life Sciences und Facility Management|
|Publication type:||Conference Poster|
|Appears in Collections:||Publikationen Life Sciences und Facility Management|
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