Chromatograph valve and method of use

Details Chromatograph valve and method of use Chromatograph valve and method of use

2005-06-28

2005-06-28

Raevis, Robert (Department: 2856)

Measuring and testing

Sampler, sample handling, etc.

With heating or cooling

Reexamination Certificate

active

06910394

ABSTRACT:
An improved chromatograph valve is provided which may be placed in close proximity to a chromatograph in order to avoid temperature variations in the space therebetween. The valve may include a multiple sample slot rotor movable in a single direction to reduce wear upon the rotor and valve body. The rotor sample slots as well as the pairs of sample and carrier gas ports upon the valve body may be diametrically opposed to allow a superior temperature gradient to be created across the valve, the gradient allowing a sample material to enter the valve in a single phase and exit the valve sufficiently volatilized.

REFERENCES:
patent: 2830738 (1958-04-01), Sorg et al.
patent: 3559703 (1971-02-01), Maul et al.
patent: 3681998 (1972-08-01), Karas et al.
patent: 3733908 (1973-05-01), Linenberg
patent: 3889538 (1975-06-01), Fingerle
patent: 4429584 (1984-02-01), Beyer et al.
patent: 4576917 (1986-03-01), Schabron
patent: 5089234 (1992-02-01), Preston
Website printout—VICI Sampling and Switching Valves (medium) (2 pages) © 1999.
Website printout—VICI Sampling and Switching Valves (high) (2 pages) © 1999.
Website printout—Valco Multiposition Valves (2 pages) © 1999.
Website printout—VICI Injectors anfd Switching Valves, Nov. 2002.
Website printout—VICI Microvolume Sample Injection© 1999.
Website printout—VICI—Microvolume Sample Injections, Nov. 2002.
Website printout—Valco Valves (from catalog) (2 pages) No Date.

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