کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1193932 | 1492359 | 2008 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Quantitative analysis of a complex mixture using proton transfer reaction in an FTICR mass spectrometer Quantitative analysis of a complex mixture using proton transfer reaction in an FTICR mass spectrometer](/preview/png/1193932.png)
The potential of chemical ionization (CI) using proton transfer reaction associated with Fourier Transform Ion Cyclotron Resonance mass spectrometry (PTR-FTICR) for quantitative analysis was evaluated using unleaded gasoline headspace as a test mixture. A kinetic study of the reaction of H3O+ on this hydrocarbon mixture was performed in a wide range of sample pressures. Thirteen unsaturated hydrocarbons were detected as protonated species. Alkanes remain undetected since they do not react with H3O+ under FTICR conditions. The mixing ratios of the unsaturated hydrocarbons were derived from the kinetic data and varied from 0.3 to 15%. Each of them remained independent of sample pressure. Moreover, the results show that a valid concentration measurement can be drawn from only one mass spectrum, providing the reaction time is appropriately chosen. The reaction kinetics of H3O+ with selected hydrocarbons were also studied, allowing to evaluate the possible biases resulting from analyte fragmentations. Finally, the results were compared with GC/MS analysis of the same sample, showing a good consistency except for the lightest components. The origin of the differences is discussed.
Journal: International Journal of Mass Spectrometry - Volume 272, Issue 1, 15 April 2008, Pages 29–37