Method and apparatus for preventing the destruction of an alkali

Details Method and apparatus for preventing the destruction of an alkali Method and apparatus for preventing the destruction of an alkali

1978-02-24

1980-05-13

Scovronek, Joseph

Chemistry: physical processes

Physical processes

Crystallization

23232C, 422 54, 422 96, G01N 2762, G01N 3108

Patent

active

042026660

ABSTRACT:
A method and apparatus for preventing the destruction of an alkali source in a nitrogen-phosphorus detector by certain reactive and derivatizing reagents encountered in gas chromatography is disclosed. Protection is afforded by lowering the temperature of an electrically heated alkali source during the period in which offensive substances in a gas under analysis are eluted, with the temperature of the source being restored after passage of the offensive substances. The temperature of the alkali source is changed by altering the current through an electrical resistance heater with a temperature control circuit that utilizes a wheatstone bridge.

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