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Title: Variable pressure ionization detector for gas chromatography

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.

Inventors:
 [1];  [2]
  1. (Knoxville, TN)
  2. (Oak Ridge, TN)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
866483
Patent Number(s):
US 4721858
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
variable; pressure; ionization; detector; gas; chromatography; method; apparatus; differentiating; organic; compounds; based; electron; affinity; capture; cell; ecd; operated; pressures; ranging; atmospheric; torr; variation; induced; emit; electrons; differentiation; isomeric; obtianed; isomer; emission; mode; output; recorded; chromatogram; obtaining; zero-crossing; compound; defined; competing; reactions; balanced; correlated; gas chromatography; organic compound; organic compounds; ionization detector; gas chromatograph; electron affinity; electron capture; pressures ranging; detector cell; variable pressure; compounds based; capture detector; capture reactions; differentiating organic; /250/

Citation Formats

Buchanan, Michelle V., and Wise, Marcus B. Variable pressure ionization detector for gas chromatography. United States: N. p., 1988. Web.
Buchanan, Michelle V., & Wise, Marcus B. Variable pressure ionization detector for gas chromatography. United States.
Buchanan, Michelle V., and Wise, Marcus B. Fri . "Variable pressure ionization detector for gas chromatography". United States. https://www.osti.gov/servlets/purl/866483.
@article{osti_866483,
title = {Variable pressure ionization detector for gas chromatography},
author = {Buchanan, Michelle V. and Wise, Marcus B.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

Patent:

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