THE MASS SPECTRUM OF TITANIUM TETRACHLORIDE

1954 ◽  
Vol 32 (11) ◽  
pp. 1039-1043 ◽  
Author(s):  
J. E. Hogg
Keyword(s):  
Titanium Dioxide ◽  
Mass Spectrum ◽  
Mass Spectrometer ◽  
Titanium Tetrachloride ◽  
Chlorine Isotopes ◽  
Commercial Titanium ◽  
Relative Abundances ◽  
Type Mass

An investigation of the mass spectrum of titanium tetrachloride prepared from both commercial titanium dioxide and titanium minerals has been carried out, using a 180° Nier-type mass spectrometer. Values for the relative abundances of the titanium and chlorine isotopes have been found. Measurements of the singly ionized trichloride group show that any variation in the relative abundances of the isotopes of titanium contained in these samples must be less than one per cent.

DEUTERIUM MIGRATION DURING THE IONIZATION OF 1-BUTENE-4-d3 BY ELECTRON IMPACT

1956 ◽  
Vol 34 (9) ◽  
pp. 1249-1254 ◽  
Author(s):  
W. A. Bryce ◽  
Paul Kebarle
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Mass Spectrum ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Electron Impact ◽  
Mass Spectrometer ◽  
Bond Rupture ◽  
Infrared Analysis ◽  
Methyl Group ◽  
Type Mass

The mass spectrum of CD3—CH2—CH=CH2 has been measured in a 90° Nier-type mass spectrometer using 50-volt electrons. High resolution nuclear magnetic resonance measurements showed that the methyl group was fully deuterated and that there were no D-atoms located elsewhere in the molecule. This result was supported by infrared analysis. A comparison of the mass spectrum with that of CH3—CH2—CH=CH2 shows that the total intensities of each group of C4, C3, C2, and C1 fragments are the same for both compounds. This indicates equal probabilities of C—C bond rupture in the dissociation of the corresponding parent ions. The distribution of fragments within the groups in the deuterated compound shows, however, that extensive migration of the D-atoms has occurred during ionization. Migration is also evident at much lower electron energies (approximately 15 ev.). The thermal cracking patterns of the two compounds, as determined by gas chromatographic analyses, are very similar.

A RECORDING UNIT AND ELECTRONIC SHUNT SELECTOR FOR A MASS SPECTROMETER

1947 ◽  
Vol 25b (4) ◽  
pp. 397-404 ◽  
Author(s):  
F. P. Lossing ◽  
R. B. Shields ◽  
H. G. Thode
Keyword(s):  
Magnetic Field ◽  
Mass Spectrum ◽  
Mass Spectrometer ◽  
Direct Current ◽  
Direct Action ◽  
Ion Currents ◽  
Current Amplifier ◽  
Recording Unit ◽  
The Magnetic Field ◽  
Type Mass

A direct action shunt selector has been designed that pre-selects the appropriate shunt so that widely different mass spectrometer ion currents can be recorded linearly on a standard chart. In conjunction with a linear direct current amplifier and a Leeds and Northrup Speedomax pen recorder, this unit allows rapid and accurate recording of a given mass spectrum, which can be scanned by varying either the magnetic field or the ion accelerating potential of the mass spectrometer. When used with a 180° Nier type mass spectrometer with well stabilized circuits, a precision of ± 0.2% in measuring the ratio of [Formula: see text] and [Formula: see text] was obtained. Also, samples of xenon were investigated and the abundances of the isotopes determined.

scholarly journals Development of New Type Ion Source of Quadrupole Type Mass Spectrometer for UF6Analysis

1980 ◽  
Vol 17 (9) ◽  
pp. 687-693
Author(s):  
Yuukou NAGATORO ◽  
Ken-ichi OCHIAI ◽  
Akira KAYA
Keyword(s):  
Mass Spectrometer ◽  
Ion Source ◽  
New Type ◽  
Type Mass

scholarly journals Developement of a Time Resolved Type Mass Spectrometer and its Application to the Studies of Arc Quenching Phenomena in SF6 Gas

Shinku ◽  
1963 ◽  
Vol 6 (8) ◽  
pp. 309-319
Author(s):  
Toshio MIYAMOTO ◽  
Akihiro KAMATANI ◽  
Masayuki GOTOH
Keyword(s):  
Mass Spectrometer ◽  
Time Resolved ◽  
Type Mass

A Digital Mass Spectrometer

1971 ◽  
Vol 49 (8) ◽  
pp. 956-965 ◽  
Author(s):  
G. L. Cumming ◽  
M. D. Burke ◽  
F. Tsong ◽  
H. McCullough
Keyword(s):  
Time Series ◽  
Mass Spectrum ◽  
Standard Deviation ◽  
Mass Spectrometer ◽  
Magnetic Tape ◽  
Recording System ◽  
New Method ◽  
Digital Output ◽  
Similar Time ◽  
Spectral Content

A mass spectrometer control and recording system has been built which utilizes synchronous incremental stepping of the magnet current during the scanning of the mass spectrum with time-locked digitizing of the output, producing successive scans as similar time series and preserving the frequency spectral content of each scan. The digital output is recorded on magnetic tape and processed later on a computer. A new method of fitting polynomials to the reduced peak heights is described, which yields a measuring precision of about 0.06% at one standard deviation on 10–20 scans of the spectrum.Some studies of fractionation are described which illustrate the large errors which may occur from this effect.

Mass Spectral Intensities of Inorganic Fluorine-Containing Compounds

1975 ◽  
Vol 29 (4) ◽  
pp. 334-337 ◽  
Author(s):  
Willard H. Beattie
Keyword(s):  
Mass Spectrometer ◽  
Time Of Flight ◽  
Mass Spectral ◽  
Flight Mass Spectrometer ◽  
Fluorine Compounds ◽  
Relative Abundances ◽  
Spectral Intensities

Mass spectral intensities and sensitivities of 24 fluorine-containing gases and vapors have been measured on a time-of-flight mass spectrometer at an ionizing voltage of 70 eV. Apparatus and techniques for handling fluorine compounds are described. The relative sensitivities and relative abundances are tabulated for the following gases: BF3, BrFs, CF4, CF3Cl, CF2Cl2, CF3I, C2F4, C2F6, ClF, ClF3, F2, HF, IF5, IF7, MoF6, NF3, N2F4, PF3, SF4, SF6, SO2F2, SiF4, UF6, and XeF4.

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