Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1979-07-02
1981-10-06
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
G01N 2173
Patent
active
042932203
ABSTRACT:
An inductively coupled plasma torch (ICP) provides an efficient means for ermally degrading many organic molecules and exciting the resulting atomic species into optical emission. Spectrometric analysis produces reliable data for qualitative and quantiative simultaneous, multi-element analyses. To determine the empirical formula of a molecular compound, a gas chronometer is used to separate a mixture and atomic emission monitored continuously by a multi-channel spectrometer over the period of time required for the rise and fall of the elution. The plural channels provide parallel outputs defining intensity relationships or ratios of the excited elements. Instantaneous sampling repetitively made during the elution period provides a large number of discrete ratios that are averaged to provide the desired empirical formula. Molecular formulas then are derivable.
REFERENCES:
patent: 3521959 (1970-07-01), Fassel et al.
patent: 3874799 (1975-04-01), Isaacs et al.
patent: 3887280 (1975-06-01), McLean
patent: 3958883 (1976-05-01), Turner
patent: 4140394 (1979-02-01), Roos
Denton Medona B.
Windsor David L.
McGraw Vincent P.
Phillips Thomas M.
Sciascia Richard S.
The United States of America as represented by the Secretary of
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