Liquid sampling valve for gas chromatograph

Details Liquid sampling valve for gas chromatograph Liquid sampling valve for gas chromatograph

1988-08-15

1990-06-12

Noland, Tom

Measuring and testing

Sampler, sample handling, etc.

Analyzer supplier

7386373, 7386484, 73 6110, 73 2335, G01N 3020

Patent

active

049322729

ABSTRACT:
A liquid sampling valve for a gas chromatographic analyzer (GCA) has a sampling stem. The stem is substantially cylindrical and has on its surface a sample collecting groove. The stem is movable from a first position in which the groove is in communication with the liquid to be analyzed for collection of same, to a second position in which the liquid collected in the groove is deposited in the GCA for analysis. The stem is also movable to a third position in which the groove is in communication with a cleaning solution capable of cleaning residues, which are left by said liquid to be analyzed, in the groove.

REFERENCES:
patent: 3746217 (1973-07-01), Hanset et al.
patent: 3933165 (1976-01-01), Budzak et al.
patent: 3991055 (1976-11-01), Godin et al.
patent: 4476732 (1984-10-01), Yang
patent: 4746491 (1988-05-01), hlin
"Sampling Valve for Use in Gas Chromatographic Analysis of the Products of Gaseous Reactions"; Aids for the Analyst; vol. 32, No. 9, p. 1213; Aug. 1960; G. L. Pratt et al.

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