Alfons Jordan

TL;DR: A system for on-line measurements of trace components with concentrations as low as a few pptv has been developed on the basis of proton transfer reactions as discussed by the authors, which allows the monitoring of metabolic processes in the human body, and examples of food research include investigations of volatile organic compound emissions from fruit, coffee and meat.

TL;DR: In this article, a system for trace gas analysis using proton transfer reaction mass spectrometry (PTR-MS) has been developed which allows for on-line measurements of components with concentrations as low as 1 ppb.

TL;DR: In this article, the Tofwerk orthogonal acceleration reflectron time-of-flight (TOF-MS) was used to measure VOCs at ultra-low concentrations (as low as a few pptv) under high mass resolution (as high as 6000m/Δm in the V-mode) with a mass range of beyond 100,000 amu.

TL;DR: In this article, the authors used a novel experimental technique, based on proton transfer reaction mass spectrometry, from measurements of emissions from laboratory scale biomass burning experiments, to estimate the source strengths of several potential HOx producing gases: formaldehyde, acetaldehyde, methanol and acetone.

TL;DR: In this paper, the formation and emission of hexenal family compounds can be monitored on-line using proton-transfer-reaction mass spectrometry (PTR-MS), avoiding the need for preconcentration or chromatography.