Apparatus for the proportioned feeding of an analysis fluid

Details Apparatus for the proportioned feeding of an analysis fluid Apparatus for the proportioned feeding of an analysis fluid

G - Physics

01

N

G01N 1/14 (2006.01) B01L 99/00 (2010.01) B01J 4/02 (2006.01) G01F 11/02 (2006.01) G01N 35/10 (2006.01) B01L 11/00 (2006.01)

Patent

CA 2088076

Apparatus for the proportioned feeding of an analysis fluid onto a target, in which the fluid is ejected onto the target in small quanta pulse-wise out of a nozzle through a nozzle outlet opening, provides precise proportioning of analysis fluid quanta which are substantially larger than in the case of the "drop on demand" methods commonly used to date for analysis fluids, but are on the other hand smaller than the minimum doses achievable to date with diluters and dispensers; the apparatus comprises a pressure chamber in which the analysis fluid is held under pressure, and a valve unit with a valve opening and a closing element movable by a positioning element, the valve unit is constructed so that the ejection of the fluid is supported by the movement of the closing element during the closure of the valve opening.

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