A5014307209- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Chromatography
- Metabolomics and Mass Spectrometry Studies
- Biochemical Analysis and Sensing Techniques
- Fermentation and Sensory Analysis
- Olfactory and Sensory Function Studies
- Meat and Animal Product Quality
- Insect Pheromone Research and Control
- Air Quality and Health Impacts
- Atmospheric chemistry and aerosols
- Indoor Air Quality and Microbial Exposure
- Proteins in Food Systems
- Mass Spectrometry Techniques and Applications
- Phytochemicals and Antioxidant Activities
- Air Quality Monitoring and Forecasting
- Microencapsulation and Drying Processes
- Genetics, Bioinformatics, and Biomedical Research
- Polysaccharides Composition and Applications
- Vehicle emissions and performance
- Infection Control and Ventilation
- Respiratory and Cough-Related Research
- Plant responses to elevated CO2
- Sensory Analysis and Statistical Methods
- Listeria monocytogenes in Food Safety
- Radioactive contamination and transfer
Fraunhofer Institute for Process Engineering and Packaging
2016-2025
Ionicon Analytik (Austria)
2008-2015
Alexion Pharma (Switzerland)
2014
Fraunhofer Society
2011-2013
Children's Hospital of Eastern Ontario
2008
Universität Innsbruck
2004-2007
Technical University of Denmark
2005
Environmental and Occupational Health Sciences Institute
2005
Research Institute for Fragrance Materials
2001
Oak Ridge National Laboratory
1992
Abstract. Within the framework of AFO 2000 project ECHO, two PTR-MS instruments were operated in combination with sonic anemometers to determine biogenic VOC fluxes from a mixed deciduous forest site North-Western Germany. The measurement was characterised by inhomogeneous composition, complex canopy structure, limited extension certain wind directions and frequent calm conditions during night time. eddy covariance (EC) technique applied since it represents most direct flux approach on scale...
The storage capability of Tedlar® bags for gaseous compounds was assessed using on-line proton-transfer-reaction mass spectrometry (PTR-MS). Sample were filled with a mixture volatile organic (VOCs) at known quantities in the ppbv range. test gas included alcohol, nitrile, aldehyde, ketone, terpene and aromatic compounds. PTR-MS enabled frequent bag-direct measurements compound abundances over 70 h period. Concentrations all decreased bag time, compound-specific decay rates. most rapid...
ABSTRACT Volatile organic compound (VOC) emissions from tobacco ( Nicotiana tabacum L. var. Bel W3) plants exposed to ozone (O 3 ) were investigated using proton‐transfer‐reaction mass‐spectrometry (PTR‐MS) and gas chromatography (GC‐MS) find a quantitative reference for plants’ responses O stress. exposures illuminated induced post‐exposure VOC emission bursts. The lag time the onset of volatile C 6 produced within octadecanoid pathway was found be inversely proportional uptake, or more...
We used proton-transfer-reaction mass spectrometry (PTR−MS) to examine the products formed when ozone reacted with materials in a simulated aircraft cabin, including loaded high-efficiency particulate air (HEPA) filter return system. Four conditions were examined: cabin (baseline), plus ozone, soiled T-shirts (surrogates for human occupants), and ozone. The addition of without T-shirts, at concentrations typically encountered during commercial travel, increased mixing ratio (v:v...
Eucalyptol (1,8-cineole) is a common active agent in non-prescription pharmaceutical products that employed to clear the airways during mucus blockages. Following ingestion of eucalyptol-containing capsule, capsule dissolves gut and transfers eucalyptol into blood, which subsequently expelled via lungs, thus exposing this decongesting inflammation-abating compound airways. The breath gas concentrations 11 healthy adult volunteers were monitored at regular intervals after using on-line...
Despite growing interest and considerable progress in breath research over the last decade, standardized practices for sampling analysis of gas volatiles remain elusive. The primary reasons this are (a) rich chemical diversity exhaled that covers an extensive range volatile organic compounds at highly varied concentrations, (b) vast disparity analytical tools employed, (c) diverse study goals (d) presence (unidentified) confounders. These aspects place stringent but divergent demands on...
We present a novel method for real-time breath-gas analysis using mass-spectrometric techniques: buffered end-tidal (BET) on-line sampling. BET has several advantages over conventional direct sampling where the subject inhales and exhales through tube. In our approach, single exhalation is administered tailored tube in which fraction of sample buffered. This increases time by an order magnitude to seconds, improving signal quality reducing total measurement per test subject. Furthermore,...
The emulsifying properties of plant legume protein isolates (soy, pea, and lupin) were compared to a milk whey protein, β-lactoglobulin (β-lg), nonionic surfactant (Tween 20). fractional composition was characterized using sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis. following emulsion measured: particle diameter, shear surface ζ-potential, interfacial tension (IT), creaming velocity. effect preheat treatment (90 °C for 10 min) on the behavior release selected volatile...
Sampling of volatile organic compounds (VOCs) has shown promise for detection a range diseases but results have proved hard to replicate due lack standardization. In this work we introduce the 'Peppermint Initiative'. The initiative seeks disseminate standardized experiment that allows comparison breath sampling and data analysis methods. Further, it share set benchmark values measurement VOCs in breath. Pilot are presented illustrate approach interpretation obtained from Peppermint...
The accuracy of quantitative volatile organic compound (VOC) detection by proton-transfer-reaction mass spectrometry (PTR-MS) is substantially enhanced if the instrument calibrated. Although quantification a in principle possible mathematical methods based on kinetic theory, underlying picture can become complicated depending gas matrix, leading to error. A simple, reliable method overcome this calibrate using standard mixtures containing VOCs at known concentrations, which enables...
This report discusses advances in instrumentation based on soft chemical ionization followed by high-resolution real-time mass spectrometry (HR-MS), specifically relation to developments proton transfer reaction (PTR-MS) technology. It is part of a Journal Breath Research series that describes recent technical breath related research relevant human health and analytical chemistry from scientific conferences. Herein we discuss the current state PTR-MS as presented at 8th International...
Abstract The consumption of seafood is driven by flavour, yet achieving its high quality remains a challenge for many species reared in recirculating aquaculture systems (RAS). A comprehensive knowledge off‐odour sources aquatic foods indispensable ensuring flavour standards. At the beginning production chain, early post‐harvest lipid oxidation products develop into endogenous off‐odours and accumulate over time. These malodours add to those already absorbed exogenously, namely from water...
We report on the search for low molecular weight molecules—possibly accumulated in bloodstream and body—in exhaled breath of uremic patients with kidney malfunction. performed non-invasive analysis gas 96 shortly before several times after transplantation using proton-transfer-reaction mass spectrometry (PTR-MS), a very sensitive technique detecting trace amounts volatile organic compounds. A total 642 individual analyses which included at least 41 different chemical components were carried...