Chemical ionization of methanol with H 3 + was used to produce excited protonated methanol ions, m/e = 33, for which metastables were observed for decomposition to protonated formaldehyde ( m/e = 31) and methyl cations ( m/e = 15): The metastable peak for 33 → 31 is broad and X...
Yen, T.F., 1976, Structural investigation of Green River shale kerogen, in:“Science and Technology of Oil Shale,” T.F. Yen, ed., Ann Arbor Science, Michigan. About this Chapter Title Pyrolysis/High Resolution Mass Spectrometry with Metastable Peak Monitoring Applied to the Analysis of Gre...
Distorted peak shapes observed in 252Cf fission fragment ionization mass spectrometry using time-of-flight mass spectrometers are shown to result from delayed dissociations of initial ions. Decompositions occurring in the ion acceleration region produce tails on parent or fragment ion peaks, and ...
Analysis of a mass-analysed ion kinetic energy peak profile for a metastable ion decomposition occurring in a collision cell floated at high voltageAnalysis of a mass-analysed ion kinetic energy peak profile for a metastable ion decomposit... Young,Hwan,Kim,... - 《Rapid Communications in Mass...
each oscillation cycle was accompanied by a negative temperature peak of∼1 K that coincided with the maximum of the oxide coverage. Compared with the other gas products, the periodicity and productivity of water were not pronounced. We detected only a slight increase in its signal during the...
‘main’ group,N=2,040) were followed while non-pregnant and visited monthly until a missed menses was reported, at which point a blood draw was taken for plasma biomarker assessment; pregnancy was confirmed a month later. Women who conceived at the peak of the rainy (‘hungry’) season ...
An important property of linear time-of-flight (TOF) mass spectrometers is their high efficiency for detecting the products of metastable decay [1,2]. Ions that decay in the field-free drift region contribute to the parent ion peak because the centre-of-mass velocity remains constant. However...
In several cases the probe reaction occurred competitively by two mechanisms, and if high energy resolution is available this allows the detailed metastable peak shapes and not merely the average kinetic energy released, to be used to characterize the product ion formed in the fast (ion source) ...
The steroid was detected by this method in an extract of human blood plasma.SimonTenovusJ.TenovusGaskellTenovusDavidTenovusS.TenovusMillingtonTenovusWileyBiomedical Mass SpectrometryGaskell, S. J. , Pike, A. W. & Millington, D. S. ( 1979 ) Selected metastable peak monitoring. A new, specific ...
Metastable Peak Analysis; a Method for Elucidating Fragmentation Mechanisms and Ion Structures in Mass Spectrometry. Part II. Water Loss from the Molecular Ion of 1,2-CyclohexanediolDefocussed metastable peaks have been used to elucidate the hitherto apparently complex fragmentation of the molecular ion...