High pressure sample injection apparatus and method for...

B - Operations – Transporting – 01 – D

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B01D 15/08 (2006.01) G01N 30/22 (2006.01) G01N 30/32 (2006.01)

Patent

CA 1044485

ABSTRACT OF THE DISCLOSURE A high pressure sample injector for liquid chromato- graphs is disclosed. The apparatus includes structure defin- ing a cylindrical dispensing chamber for receiving the sample to be injected, into the flow path of a high pressure stream of carrier fluid in a liquid chromatograph. Control structure is interposed between the dispensing chamber and the flow path of the carrier stream for preventing liquid flow from the carrier stream to the dispensing chamber, and for enabling flow in the opposite direction only when the pressure in the dis- pensing chamber at least equals the carrier stream pressure. A pressurizing apparatus is connected to the dispensing chamber to raise its pressure, when desired, to a value at least equal to that of the carrier stream, in order that the sample may be injected into the carrier without reducing the carrier stream pressure.

231835

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