Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1986-04-21
1988-01-26
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250382, G01N 2770
Patent
active
047218584
ABSTRACT:
Method and apparatus for differentiating organic compounds based on their electron affinity. An electron capture detector cell (ECD) is operated at pressures ranging from atmospheric to less than 1 torr. Through variation of the pressure within the ECD cell, the organic compounds are induced to either capture or emit electrons. Differentiation of isomeric compounds can be obtianed when, at a given pressure, one isomer is in the emission mode and the other is in the capture mode. Output of the ECD is recorded by chromatogram. The invention also includes a method for obtaining the zero-crossing pressure of a compound, defined as the pressure at which the competing emission and capture reactions are balanced and which may be correlated to the electron affinity of a compound.
REFERENCES:
patent: 3601609 (1971-08-01), Yauger, Jr.
patent: 4137453 (1979-01-01), Siegel
patent: 4166379 (1979-09-01), Bradshaw
Michelle V. Buchanan and Geraldine Olerich, "Differentiation of Polycyclic Aromatic Hydrocarbons Using Electron Capture Negative Chemical Ionization", Organic Mass Spectrometry, vol. 19, No. 10, (1984), pp. 486-489.
Littlewood, A. B., "Electron Capture Detector" In: Gas Chromatography: Principles, Techniques, and Applications (New York, Academic Press, 1970), pp. 315-322.
Buchanan Michelle V.
Wise Marcus B.
Hamel Stephen D.
Hannaher Constantine
Hightower Judson R.
Howell Janice A.
The United States of America as represented by the United States
LandOfFree
Variable pressure ionization detector for gas chromatography does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable pressure ionization detector for gas chromatography, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable pressure ionization detector for gas chromatography will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1469338