| 摘要 |
<p>A method and apparatus is provided for actively controlling the hydraulic pressure within an aspirate-dispense system (10) for aspirating and dispensing precise and/or predetermined quantities of fluid or reagent (14). The method provides an efficient pressure compensation scheme to achieve the optimal pressures for aspirating and dispensing. The optimized pressure are achieved by a series of operations of a positive displacement pump (22) and a drop-on-demand valve (12) of the aspirate-dispense system (10). Advantageously, the method increases process speed, improves reliability and accuracy, and reduces dilution and wastage of reagent (14).</p> |
