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    • 4. 发明授权
    • Sample liquid transfer means in an automatic chemical testing apparatus
    • 自动化学测试仪器中的样品液体转移装置
    • US4140488A
    • 1979-02-20
    • US830705
    • 1977-09-06
    • Daniel R. MackJames R. Eseke
    • Daniel R. MackJames R. Eseke
    • B01L3/02G01N35/10G01N1/14G01N31/00
    • G01N35/1083B01L3/022
    • Means for reducing intersample contamination in an automatic chemical testing apparatus, in which liquid from a sample is aspirated from a sample source into a reservoir, and aliquots of the sample are each dispensed into individual reaction containers for analysis by well-known means. A cylindrical reservoir is utilized with a piston therein shaped for pushing out virtually all of the remaining sample from the cylinder after dispensing the sample liquid through a hollow needle, communicating with the cylinder. A solid pin coaxially mounted within the piston is projected through the needle and has minimum clearance therewith, for pushing remaining sample out of the needle. The portion of the pin projecting through the needle is retracted into the piston prior to aspiration of liquid from a next sample.
    • 用于减少自动化学测试装置中的样品间污染的手段,其中将来自样品的液体从样品源吸入储存器,并将样品的等分试样分配到各个反应容器中,以通过公知的方法分析。 使用圆柱形储存器,其中活塞形成用于在将样品液体通过与气缸连通的中空针头之后,从气缸中推出几乎所有剩余的样品。 同轴地安装在活塞内的固体销通过针头突出并且具有最小的间隙,用于将剩余的样品推出针头。 在从下一个样品抽取液体之前,突出穿过针头的销的部分缩回到活塞中。