| 摘要 |
Apparatus for the metered supply of an analysis liquid (7) onto a target (5), which involves ejecting the liquid in small quantums, in a pulsating manner, from a nozzle (2) through a nozzle outlet orifice (3) onto the target. So as to permit precise metering of analysis liquid quantums which are distinctly larger than in the case of the "drop on demand" methods used hitherto for analysis liquids, but, on the other hand, are smaller than the minimal metered amounts achievable hitherto using diluters and dispensers, an apparatus is proposed which has a pressure chamber (1) in which the analysis liquid is pressurised, and in which apparatus a valve device (11) having a valve orifice (23) and a closure element (13) moved by an actuator (12) is provided, the valve device (11) being designed in such a way that ejection of the liquid is assisted by the movement of the closure element (13) when closing the valve orifice (23). <IMAGE> |
