Chemistry: physical processes – Physical processes – Crystallization
Patent
1976-01-12
1977-06-28
Serwin, R.E.
Chemistry: physical processes
Physical processes
Crystallization
23254E, 23232C, 73 231, 324 30B, G01N 2742, G01N 3108, G01N 3112
Patent
active
040322963
ABSTRACT:
An electrolytic conductivity detector system is disclosed that is particularly useful for gas chromatography. Small gas molecules that will support conductivity are conducted to a gas-liquid contactor where the gas is mixed with a solvent to form a heterogeneous gas-liquid mixture. The gas-liquid mixture is thereafter directed to a gas-liquid separator and a conductivity cell where liquid phase is separated from gas phase and separated liquid phase utilized for conductivity measurement. A unitized gas-liquid separator-conductivity cell may be utilized that includes an inner electrode tube extending upwardly into a larger diameter bore of a metallic outer electrode block, the portion between the block and upper portion of the tube forming a liquid phase reservoir with the liquid phase in the reservoir being utilized for conductivity measurement while between the two electrodes. Three alternate embodiments of a unitized separator-conductivity cell are also disclosed as is a gas-liquid separator and separate conductivity cell. The overall system is small and compact, yet rugged, and is particularly well suited for selective detection of nitrogen, halogen and sulfur containing compounds, although not being limited thereto.
REFERENCES:
patent: 2221307 (1940-11-01), Christie
patent: 2810879 (1957-10-01), Cade et al.
patent: 3854881 (1974-12-01), Cohen
Nesbitt John R.
Purdue Research Foundation
Serwin R.E.
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