Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Penggao Duan"'
Autor:
Penggao Duan, Lucas M. Amundson, Hilkka I. Kenttämaa, Brian E. Winger, Enada F. Archibold, Jayalakshmi Somuramasami
Publikováno v:
Journal of the American Society for Mass Spectrometry. 22:1040-1051
Several lignin model compounds were examined to test whether gas-phase ion-molecule reactions of trimethylborate (TMB) in a FTICR can be used to differentiate the ortho-, meta-, and para-isomers of protonated aromatic compounds, such as those formed
Autor:
David S. Pinkston, Mingkun Fu, Vanessa A. Gallardo, Steven C. Habicht, Hilkka I. Kenttämaa, Penggao Duan
Publikováno v:
Energy & Fuels. 24:3119-3124
Chemical ionization (CI) using the [ClMn(H2O)]+ reagent ion combined with collision-activated dissociation is demonstrated to allow the differentiation of isomeric alkanes (C8H18 and C9H20) and alkenes (C8H16) in a Fourier transform ion cyclotron res
Publikováno v:
Journal of Pharmaceutical and Biomedical Analysis. 51:805-811
A liquid chromatography/tandem mass spectrometry (LC/MS 3 ) method based on ion-molecule reactions and collision-activated dissociation (CAD) is presented for the identification of analytes with the N-oxide functional group directly in mixtures. Tri(
Publikováno v:
Analytical Chemistry. 82:608-614
In recent years, laser-induced acoustic desorption (LIAD) coupled with a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer has been demonstrated to provide a valuable technique for the analysis of a wide variety of nonvolatile, the
Autor:
Steven C. Habicht, Hilkka I. Kenttämaa, Murray R. Gray, Xiaoli Tan, Penggao Duan, Kuangnan Qian, Klaus Müllen, David S. Pinkston, Vanessa A. Gallardo
Publikováno v:
Energy & Fuels. 23:5564-5570
Laser-induced acoustic desorption (LIAD)/electron ionization (EI) was used to study asphaltene model compounds and asphaltenes derived from North American crude oil in a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer (MS). Succe
Autor:
Sen Jason Li, Michael J. Yurkovich, Matthew S. Platz, Ryan C. Shea, Sarah M. Mandell, Michael A. Watkins, Hilkka I. Kenttämaa, Penggao Duan, Eric M. Tippmann
Publikováno v:
International Journal of Mass Spectrometry. 287:16-20
The reactivity of two metallated nitrenium ions toward various substrates was examined in the gas phase. The nitrenium ions were generated by a reaction of benzoyl azide with laser-ablated Mg + or Cu + in a Fourier transform ion cyclotron resonance m
Publikováno v:
International Journal of Mass Spectrometry. 282:77-84
A mass spectrometric method is presented that facilitates the identification and differentiation of primary, secondary and tertiary amino functionalities in protonated monofunctional analytes. This method utilizes gas-phase ion–molecule reactions o
Publikováno v:
The Journal of Organic Chemistry. 73:4888-4894
A mass spectrometric method is presented for the rapid identification of compounds that contain the aromatic N-oxide functional group. This method utilizes a gas-phase ion/molecule reaction with 2-methoxypropene that yields a stable adduct for proton
Publikováno v:
Analytical Chemistry. 80:3416-3421
A mass spectrometric method has been developed for the identification of the carboxylic acid functional group in analytes evaporated and ionized by electrospray ionization (ESI). This method is based on gas-phase ion-molecule reactions of ammoniated
Autor:
Steven C. Habicht, Mingkun Fu, Penggao Duan, David S. Pinkston, Kuangnan Qian, Hilkka I. Kenttämaa
Publikováno v:
Analytical Chemistry. 80:1847-1853
Laser-induced acoustic desorption (LIAD), combined with chemical ionization with the ClMn(H(2)O)(+) ion, is demonstrated to facilitate the analysis of base oils by Fourier transform ion cyclotron resonance mass spectrometry. The LIAD/ClMn(H(2)O)(+) m