发明授权
- 专利标题: Method and apparatus for aspirating and dispensing sample fluids
- 专利标题(中): 用于抽吸和分配样品流体的方法和设备
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申请号: US204912申请日: 1998-12-03
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公开(公告)号: US6158269A公开(公告)日: 2000-12-12
- 发明人: Jeffrey S. Dorenkott , William R. Downing
- 申请人: Jeffrey S. Dorenkott , William R. Downing
- 申请人地址: NY Tarrytown
- 专利权人: Bayer Corporation
- 当前专利权人: Bayer Corporation
- 当前专利权人地址: NY Tarrytown
- 主分类号: G01N33/493
- IPC分类号: G01N33/493 ; G01F11/02 ; G01N1/38 ; G01N35/10 ; G01M3/02 ; B01L3/02 ; G01N1/14
摘要:
A method and apparatus for aspirating and dispensing a sample fluid. The apparatus includes a dilutor having a port coupled to a first port of a flow through pressure transducer and to a bleed valve. A second port of the flow through pressure transducer is coupled to a first port of a sample probe. The flow through pressure transducer provides transducer signals to a detector circuit. In response to the transducer signals provided thereto, the detector detects the occurrence or non-occurrence of a plurality of different events. The dilutor is operational to aspirate and dispense fluids such as air or liquid samples in order to provide accurate aspiration and dispensation of a sample fluid. The method includes the steps of first aspirating a predetermined amount of air with the dilutor, dispensing air while moving the sample probe towards the fluid sample, measuring the pressure in the probe and using this pressure value as a baseline, monitoring the pressure and detecting when the pressure changes, which is indicative of the probe entering the fluid sample, bleeding the pressure into the atmosphere while returning the dilutor to its home position, aspirating a predetermined amount of fluid to remove dilutor backlash, waiting a predetermined amount of time to finish bleeding the system, then aspirating the fluid sample with the dilutor. With such a method and apparatus, accurate aspirations/dispensations are provided, especially when small volumes are required.
公开/授权文献
- US5443860A Sealing method for reaction gases 公开/授权日:1995-08-22