Sample valve for solute modulated synchronous detection

Details Sample valve for solute modulated synchronous detection Sample valve for solute modulated synchronous detection

1986-06-02

1987-06-02

Chin, Peter

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

73 23, 73 27R, 7386481, 422 89, 436161, B01L 1100

Patent

active

046702202

ABSTRACT:
A sample valve for solute modulated synchronous detection alternately directs into a detector a sample gas stream F.sub.1 which passes through a modulator cell and a reference gas stream F.sub.2 which passes through a balance cell. The sample valve is made of a symmetrically structured chamber with inlets and outlets. An ordinary valve causes a control gas to stream into the chamber alternately though one of two openings to exit openings of the chamber are synchronously opened and closed so that gas streams F.sub.1 and F.sub.2 are alternately led into the detector and out of the system.

REFERENCES:
patent: 3357233 (1967-12-01), Roof
patent: 3362228 (1968-01-01), Stuben
patent: 4231990 (1980-11-01), Jottier
patent: 4254654 (1981-03-01), Clouser et al.
patent: 4388411 (1983-06-01), Lovelock
Wade et al, "Fluidic Logic Sampling and Injection System for Gas Chromatography", Analytical Chem., vol. 44, No. 1, (1/72), pp. 131-139.

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