Chlorine specific gas chromatographic detector

Details Chlorine specific gas chromatographic detector Chlorine specific gas chromatographic detector

1996-01-30

2000-10-17

Wieder, Kenneth A.

Electricity: measuring and testing

Using ionization effects

For analysis of gas, vapor, or particles of matter

324449, 324123R, 324455, 73 2802, G01N 2762, G01N 2768

Patent

active

061337404

ABSTRACT:
A method and apparatus are set forth which enables a gas chromatographic column output to be connected with a pulse discharge chamber in which chemically bound chlorine in volatile organic or inorganic samples is measured. A spark discharge is formed in the chamber to ionize and excite helium molecules to a metastable state. In turn, that transfers excitation to a trace of krypton gas in the chamber which is ionized, and the ionized krypton then preferentially binds with chemically bound chlorine. The latter binding occurs with the liberation of a photon centered at about 222 nanometers thereby defining a spectral region of interest which is measured by a photomultiplier tube to quantify chemically bound chlorine.

REFERENCES:
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patent: 5317271 (1994-05-01), Wentworth et al.
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patent: 5394091 (1995-02-01), Wentworth et al.
patent: 5394092 (1995-02-01), Wentworth et al.
patent: 5541519 (1996-07-01), Stearn et al.

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