Radiant energy – Ionic separation or analysis – With sample supply means
Patent
1978-12-01
1981-05-05
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
With sample supply means
250281, 250423R, B01D 5944, H01J 4900
Patent
active
042661277
ABSTRACT:
A mass spectrometer instrument for chemical analysis. An instrument of this invention is capable of performing cyclic operation repetitively and automatically. Each operation cycle consists of at least one chemical ionization operation mode and one venting operation mode. Furthermore, an instrument of this invention is capable of performing cyclic operation which includes multiple chemical ionization operation modes in which each of a plurality of reagent gases is individually employed for each chemical ionization operation mode. Electron impact ionization can also be conducted during each venting operation mode should it be desired.
Positive ion and negative ion spectra are also recorded simultaneously which further improves the efficiency of the cyclic operation.
REFERENCES:
patent: 3536910 (1970-10-01), Ormrod et al.
patent: 3733907 (1973-05-01), Briggs
patent: 4005291 (1973-09-01), Arsenault
patent: 4018241 (1977-04-01), Sodal et al.
patent: 4105916 (1978-08-01), Siegel
"Alternate Scan CI/EI Mass Spectrometry", Taylor et al., Pittsburgh Conference on Anal. Chem. & Applied Spect. Mar. 1979.
"A 15-CM Radius Mass Spectrometer which Simultaneously Collects Positive and Negative Ions", Svec et al., International J of Mass Spectrometry and Ion Physics I, 1968, pp. 41-52.
"A New Chemical Ionization Mass Spectrometer", Chait et al., Adv. Mass Spect., vol. 6, 471, 1974, pp. 471-476.
"Gas Chromatograph-Mass Spectrometer with Dual Electron Impact/High Pressure Ion Sources", Ryhage, Anal. Chem., vol. 48, No. 12, Oct. 1770, pp. 1829-1831.
"G. C.-C.I.-M.S.-Source Design", Kruger et al., 21st Annual Conference on Mass Spectrometry, 1973, pp. 381-384.
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