Results 131 to 140 of about 1,487 (151)

Comprehensive VOC profiling of an apple germplasm collection by PTR-ToF-MS

Metabolomics, 2014
Fruit quality is generally represented by several components, among which aroma plays a fundamental role in determining the overall appreciation. To generate a comprehensive data inventory of aroma compounds in apple, a large collection represented by 190 apple accessions was characterized by a proton transfer reaction-time of flight-mass spectrometry (
Farneti, Brian, Khomenko, Iuliia, Cappellin, Luca, Ting, Valentina, Romano, Andrea, Biasioli, Franco, Costa, G., Costa, Fabrizio   +7 more
openaire   +3 more sources

Effects of elevated oxygen levels on VOC analysis by means of PTR-ToF-MS

Journal of Breath Research, 2019
Proton-transfer-reaction-time-of-flight-mass-spectrometry (PTR-ToF-MS) is a powerful tool for real-time monitoring of volatile organic compound (VOC) profiles in human breath. However, varying oxygen concentrations in the sample matrix may influence results from VOC analysis by PTR-ToF-MS.
Phillip Trefz, Giovanni Pugliese, Beate Brock, Jochen K Schubert, Wolfram Miekisch   +4 more
openaire   +2 more sources

Classification of 7 monofloral honey varieties by PTR-ToF-MS direct headspace analysis and chemometrics

Talanta, 2016
Honey, in particular monofloral varieties, is a valuable commodity. Here, we present proton transfer reaction-time of flight-mass spectrometry, PTR-ToF-MS, coupled to chemometrics as a successful tool in the classification of monofloral honeys, which should serve in fraud protection against mispresentation of the floral origin of honey.
Schuhfried, E., Sanchez del Pulgar, J., Bobba, M., Piro, R., Cappellin, Luca, Märk, T. D., Biasioli, Franco   +6 more
openaire   +4 more sources

Assessing VOC emission by different wood cores using the PTR-ToF-MS technology

Wood Science and Technology, 2016
To date, the chemical composition and the amount and diversity of volatile organic compounds (VOCs) released by different woody plants samples have been measured and characterized through one of the most common techniques, the gas chromatography–mass spectrometry. However, this technique is very time-consuming and requires sample preparation.
TAITI, COSIMO, Costa, C., GUIDI NISSIM, WERTHER, BIBBIANI, SUSANNA, AZZARELLO, ELISA, MASI, ELISA, PANDOLFI, CAMILLA, Pallottino, F., Menesatti, P., MANCUSO, STEFANO   +9 more
openaire   +3 more sources

VOC profiling of apple germplasm by PTR-ToF-MS

2013
This work aimed at profiling apple VOC content through a broad investigation of germplasm collection (188 apple varieties). Apple VOCs were assessed by headspace analysis of cut samples by using PTR-ToF-MS. Multivariate statistical analysis of data obtained by the PTR-ToF-MS showed the possibility to robustly cluster apple varieties based on their VOC ...
Khomenko, Iuliia, Farneti, Brian, Cappellin, Luca, Costa, Fabrizio   +3 more
openaire   +3 more sources

Nose-space analysis of olive oil by PTR-ToF-MS

2017
In the present work Proton Transfer Reaction-Mass Spectrometry was applied for the discrimination of products contained olive oil by nose-space analysis. Olive oil samples were submitted to eight panelists in duplicate. In the agreement with the results of headspace analysis the nose-space data characterized different types of olive ...
Iuliia Khomenko, Eugenio Aprea, Franco Biasioli, Flavia Gasperi   +3 more
openaire   +2 more sources

Detector aging induced mass discrimination and non-linearity effects in PTR-ToF-MS

International Journal of Mass Spectrometry, 2014
Abstract In this short technical paper we demonstrate how aging of the micro-channel plate (MCP) detector in a PTR-ToF-MS instrument induces strong mass discrimination and detection non-linearity effects. Based on exemplary data from an 11-week measurement campaign we show how detector aging led to an m/z-dependent loss in detection efficiency in the
M. Müller, T. Mikoviny, A. Wisthaler
openaire   +1 more source

PTR-TOF-MS approach for food characterization and valorization

2016
The proton transfer – time of flight – mass spectrometer (PTR-TOF-MS) is an innovative tool that enables the real-time separation and quantification of volatile organic compounds (VOCs) in complex gas mixtures, from trace levels up to parts per million, with a low fragmentation level due to a low-energy chemical ionization approach.
MASI, ELISA, TAITI, COSIMO, Alpi, Amedeo, VIGNOLINI, PAMELA, HEIMLER, DANIELA, ROMANI, ANNALISA, MANCUSO, STEFANO   +6 more
openaire   +1 more source

Multivariate Approaches to Electronic Nose and PTR–TOF–MS Technologies in Agro-Food Products

2016
Beyond the appearance of agricultural products, affecting the consumers’ choice, volatile organic compounds play a crucial role in agro-industrial processes and all food-related sciences and technologies as well as food perception and acceptability, being at the origin of its aroma and flavor.
COSTA, C, TAITI, COSIMO, STRANO, MC, MORONE, G, ANTONUCCI, F, MANCUSO, STEFANO, CLAPS, S, PALLOTTINO, F, SEPE, L, BAZIHIZINA, NADIA, MENESATTI, P.   +10 more
openaire   +2 more sources

Direct Injection Analysis of Fruit VOCs by PTR-ToF-MS: The Apple Case Study

2018
The instrumental characterization of volatile organic compounds (VOCs) is essential to have a precise, reliable, and reproducible estimation of food aroma and, therefore, of the overall product quality. In this report, we introduce four analytical approaches based on PTR-MS (proton transfer reaction-mass spectrometry) technology suitable to fully ...
openaire   +4 more sources