Injection valve for liquid chromatographic column and system the

Details Injection valve for liquid chromatographic column and system the Injection valve for liquid chromatographic column and system the

1983-03-03

1984-10-16

Swisher, S. Clement

Measuring and testing

Sampler, sample handling, etc.

Conduit or passageway section capture chamber

231149, 7386483, G01N 110

Patent

active

044767315

ABSTRACT:
A multi-position rotary valve for injecting a variable liquid sample into a stream of diluent flowing through a high pressure liquid chromatograhic column, without interrupting diluent pressure conditions is disclosed. The valve is switchable between a load position and an inject position. Associated with the valve are a plurality of sample loops each of whose upstream ends are selectively connected to a needle cavity in the valve. Moreover the valve possesses means for arcuately articulation whereby one of the loops may be selected from loading of the sample and then for presentation to a diluent under pressure while in each of such position is also in operative alignment with the column.

REFERENCES:
patent: 3114393 (1963-12-01), Vlasic
patent: 4059009 (1977-11-01), Ball et al.
patent: 4068528 (1978-01-01), Gundelfinger
patent: 4152391 (1979-05-01), Cabrera

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