Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1973-12-17
1976-01-20
Smith, Alfred E.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
23253R, 23253PC, G01N 2742
Patent
active
039341933
ABSTRACT:
An electrolytic conductivity detector 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 unitized gas-liquid separator-conductivity cell where liquid phase is separated from gas phase and separated liquid phase utilized for conductivity measurement. The preferred embodiment of the unitized gas-liquid separator-conductivity cell 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 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.
Hille Rolf
Purdue Research Foundation
Smith Alfred E.
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