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High-voltage spark atomic emission detector for gas chromatographyA dc-powered, double-gap, miniature nanosecond spark source for emission spectrochemical analysis of gas chromatographic effluents is described. The spark is formed between two thoriated tungsten electrodes by the discharge of a coaxial capacitor. The spark detector is coupled to the gas chromatograph by a heated transfer line. The gas chromatographic effluent is introduced into the heated spark chamber where atomization and excitation of the effluent occurs upon breakdown of the analytical gap. A microcomputer-controlled data acquisition system allows the implementation of time-resolution techniques to distinguish between the analyte emission and the background continuum produced by the spark discharge. Multiple sparks are computer averaged to improve the signal-to-noise ratio. The application of the spark detector for element-selective detection of metals and nonmetals is reported.
Document ID
19830031890
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Calkin, C. L.
(Michigan State Univ. East Lansing, MI, United States)
Koeplin, S. M.
(Michigan State Univ. East Lansing, MI, United States)
Crouch, S. R.
(Michigan State University East Lansing, MI, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Publication Information
Publication: Applied Spectroscopy
Volume: 36
Issue: 4, 19
Subject Category
Inorganic And Physical Chemistry
Accession Number
83A13108
Funding Number(s)
CONTRACT_GRANT: NAG3-93
Distribution Limits
Public
Copyright
Other

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