ANALYSIS OF CARBON MONOXIDE-NITROGEN MIXTURES BY HIGH RESOLUTION MASS SPECTROMETRY
A single focusing mass spectrometer was converted into a double focusing instrument. Relatively high resolution is obtained by decreasing the slit widths and minimizing the ion-optic aberrations. A relatively low ion accelerating voltage (2000 volts) was utilized compared to those normally used for high resolution work. Essentially all of the original equipment was reused in the double focusing system. Although the original source slit was decreased from 10 to 0.4 mils and the source alpha value was decreased from 0.04 to 0.008 radians, sufficient sensitivity is obtained for quantitative gas analysis with the ordinary electrometer tube amplifters utilizing 4 x 10/sup 10/ ohms input grid resistors and 100% inverse feedback. Carbon monoxide -- nitrogen mixtures were analyzed quantitatively. The results indicated that direct quantitative analysis can be obtained on mixtures ranging from 99 to 10% carbon monoxide in nitrogen. Analysis of lower percentages may be made possible through indirect reading of the peak should it be necessary. It appears that the instrument should be adaptable to research problems concerning these two gases. The immediate problem posed is the analysis of oxygen and nitrogen in metals. Other applications may be possible such as analysis of metastable fragment ions of hydrocarbons or identification of doublet peaks requiring high resolution. (auth)
- Research Organization:
- Ames Lab., Ames, Iowa
- DOE Contract Number:
- W-7405-ENG-82
- NSA Number:
- NSA-16-028868
- OSTI ID:
- 4779928
- Report Number(s):
- IS-504
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-62
- Country of Publication:
- United States
- Language:
- English
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