Volatile compounds profiling by using proton transfer reaction-time of flight-mass spectrometry (PTR-ToF-MS). The case study of dark chocolates organoleptic differences

2019 ◽  
Vol 54 (1) ◽  
pp. 92-119 ◽  
Author(s):  
Zoé Deuscher ◽  
Isabelle Andriot ◽  
Etienne Sémon ◽  
Marie Repoux ◽  
Sébastien Preys ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Reaction Time ◽  
Proton Transfer ◽  
Volatile Compounds ◽  
Transfer Reaction ◽  
Time Of Flight ◽  
Proton Transfer Reaction ◽  
Flight Mass Spectrometry ◽  
Tof Ms

Smokers Breath as Seen by Proton-Transfer-Reaction Time-of-Flight Mass Spectrometry (PTR-TOF-MS)

2013 ◽  
pp. 89-116 ◽  
Author(s):  
Ingrid Kohl ◽  
Jens Herbig ◽  
Jürgen Dunkl ◽  
Armin Hansel ◽  
Martin Daniaux ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Reaction Time ◽  
Proton Transfer ◽  
Transfer Reaction ◽  
Time Of Flight ◽  
Proton Transfer Reaction ◽  
Flight Mass Spectrometry ◽  
Tof Ms

scholarly journals Field measurements of methylglyoxal using proton transfer reaction time-of-flight mass spectrometry and comparison to the DNPH–HPLC–UV method

2018 ◽  
Vol 11 (10) ◽  
pp. 5729-5740 ◽  
Author(s):  
Vincent Michoud ◽  
Stéphane Sauvage ◽  
Thierry Léonardis ◽  
Isabelle Fronval ◽  
Alexandre Kukui ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Reaction Time ◽  
Proton Transfer ◽  
Transfer Reaction ◽  
Time Of Flight ◽  
Field Measurements ◽  
Proton Transfer Reaction ◽  
Atmospheric Measurements ◽  
Flight Mass Spectrometry ◽  
Tof Ms

Abstract. Methylglyoxal (MGLY) is an important atmospheric α-dicarbonyl species for which photolysis acts as a significant source of peroxy radicals, contributing to the oxidizing capacity of the atmosphere and, as such, the formation of secondary pollutants such as organic aerosols and ozone. However, despite its importance, only a few techniques exhibit time resolutions and detection limits that are suitable for atmospheric measurements. This study presents the first field measurements of MGLY by proton transfer reaction time-of-flight mass spectrometry (PTR-ToF-MS) performed during the ChArMEx SOP2 field campaign. This campaign took place at a Mediterranean site characterized by intense biogenic emissions and low levels of anthropogenic trace gases. Concomitant measurements of MGLY were performed using the 2,4-dinitrophenylhydrazine (DNPH) derivatization technique and high performance liquid chromatography (HPLC) with UV detection. PTR-ToF-MS and DNPH–HPLC measurements were compared to determine whether these techniques can perform reliable measurements of MGLY. Ambient time series revealed levels of MGLY ranging from 28 to 365 pptv, with a clear diurnal cycle due to elevated concentrations of primary biogenic species during the daytime, and its oxidation led to large production rates of MGLY. A scatter plot of the PTR-ToF-MS and DNPH–HPLC measurements indicates a reasonable correlation (R2=0.48) but a slope significantly lower than unity (0.58±0.05) and a significant intercept of 88.3±8.0 pptv. A careful investigation of the differences between the two techniques suggests that this disagreement is not due to spectrometric interferences from H3O+(H2O)3 or methyl ethyl ketone (or butanal) detected at m∕z 73.050 and m∕z 73.065, respectively, which are close to the MGLY m∕z of 73.029. The differences are more likely due to uncorrected sampling artifacts such as overestimated collection efficiency or loss of MGLY into the sampling line for the DNPH–HPLC technique or unknown isobaric interfering compounds such as acrylic acid and propanediol for the PTR-ToF-MS. Calculations of MGLY loss rates with respect to OH oxidation and direct photolysis indicate similar contributions for these two loss pathways.

Soil volatile analysis by proton transfer reaction-time of flight mass spectrometry (PTR-TOF-MS)

2015 ◽  
Vol 86 ◽  
pp. 182-191 ◽  
Author(s):  
Stefano Mancuso ◽  
Cosimo Taiti ◽  
Nadia Bazihizina ◽  
Corrado Costa ◽  
Paolo Menesatti ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Reaction Time ◽  
Proton Transfer ◽  
Transfer Reaction ◽  
Time Of Flight ◽  
Proton Transfer Reaction ◽  
Volatile Analysis ◽  
Flight Mass Spectrometry ◽  
Tof Ms

scholarly journals Detection of Plant Volatiles after Leaf Wounding and Darkening by Proton Transfer Reaction “Time-of-Flight” Mass Spectrometry (PTR-TOF)

PLoS ONE ◽  
2011 ◽  
Vol 6 (5) ◽  
pp. e20419 ◽  
Author(s):  
Federico Brilli ◽  
Taina M. Ruuskanen ◽  
Ralf Schnitzhofer ◽  
Markus Müller ◽  
Martin Breitenlechner ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Reaction Time ◽  
Proton Transfer ◽  
Plant Volatiles ◽  
Transfer Reaction ◽  
Time Of Flight ◽  
Proton Transfer Reaction ◽  
Flight Mass Spectrometry
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