Automated preparative gas chromatograph

Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample

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422 90, 436161, 73 2342, 73 234, 73 2335, 55386, G01N 3002

Patent

active

050341936

ABSTRACT:
A preparative-scale gas chromatographic system has conduits and valves adapted for analysis and collection of low volatility effluent. An injection site is provided for alternately supplying liquid solvent for removing condensed effluent from the system when the flow of effluent is terminated. Conduits are joined within the thermal conductivity detector of the system to prevent condensation at the joint. Conduits are provided with copper jackets which are coupled to sources of thermal energy to prevent condensation within the conduits. A trap filter provides backpressure in the collection system wherein recovery of condensed effluent in the filter is facilitated by the smooth surface of the filter.

REFERENCES:
patent: 2343402 (1944-03-01), Clifford
patent: 3225520 (1965-12-01), Durew
patent: 3267646 (1966-09-01), Kauss et al.
patent: 3390513 (1968-07-01), Jeutzsch et al.
patent: 3408793 (1968-11-01), Frazer
patent: 3545279 (1970-12-01), Jentzsch et al.
patent: 4154583 (1979-05-01), Favre et al.
Roeraade, J. and Enzell, C. R. "Preparative Gas Chromatography with Glass Capillary Columns", J. of High Resolution Chromatography & Chromatography Communications, (Mar. 1979), pp. 123-132.
Roz, B., Bonmati, R., Hagenbach, G. and Valentin, P. "Practical Operation of Prep-Scale Gas Chromatographic Units", J. of Chromatographic Science, (Aug. 1976), pp. 367-380.
Varex Automatic Preparative Gas Chromatograph, Varex Corporation, Product Literature, (.RTM.1985).

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