Exhaust valve for supercritical fluid chromatograph

Details Exhaust valve for supercritical fluid chromatograph Exhaust valve for supercritical fluid chromatograph

1990-01-16

1991-07-16

Williams, Hezron E.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

73 2335, 73 2342, G01N 1500

Patent

active

050314483

ABSTRACT:
An exhaust valve for a supercritical fluid chromatography apparatus. The exhaust valve is a constant-pressure release valve which maintains the pressure inside the flow passage system of the apparatus constant. Eluates are discharged via the valve. An organic solvent effective at atmospheric pressures, such as toluene, dichloromethane, or benzene, which readily dissolves the analyzed sample at ordinary temperature, is introduced either in the flow passage on the upstream side of the valve or in the flow passage in the valve to prevent the flow passage in the valve from clogging.

REFERENCES:
patent: 4454749 (1984-06-01), Guillemin et al.
patent: 4597943 (1986-07-01), Sugiyama et al.
patent: 4835109 (1989-05-01), Trisciani et al.
"Supercritical Fluid Chromatography with Small Particle Diameter Packed Columns", Dennis R. Gere, Analytical Chemistry, vol. 54, No. 4, Apr. 1982, pp. 736-740.

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