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    • 6. 发明授权
    • Microbiosensor used in-situ
    • 微生物传感器原位使用
    • US5611900A
    • 1997-03-18
    • US504687
    • 1995-07-20
    • R. Mark WordenDavid EmersonSerban F. Peteu
    • R. Mark WordenDavid EmersonSerban F. Peteu
    • C12Q1/00G01N27/26
    • C12Q1/001Y10S435/817
    • The present invention is a novel, ultra-small tip, internal referenced, amperometric microbiosensor that uses an immobilized biological interface to measure the concentration of an analyte in a specimen. It consists of a casing that narrows to an aperture having a diameter at the tip no greater than 4 .mu.m; enclosed within the casing a reference electrode and a working electrode both immersed in electrolyte; within the aperture, an inner polymer film, an immobilized biological interface layer, and an outer specimen-compatible, non-virulent polymer film. Another important feature of the present invention is that the microbiosensor can readily be encased in a durable protective sheath. The microbiosensor is especially useful in situ for specimens that cannot be mixed, such as in situ compounds in unmixed fluid, or semi-solid specimens. The microbiosensor provides 90% response time less than 5 seconds and typically about 1 second, less than 5% change in output current due to changes in the stirring rate, and the ability to measure in viscous, semi-solid or porous-solid specimens with a spatial resolution as small as 30 .mu.m.
    • 本发明是一种新颖的超小尖端,内部参考的电流型微生物传感器,其使用固定化的生物界面来测量样品中分析物的浓度。 它由一个缩小到尖端直径不大于4μm的孔的壳体组成; 封装在壳体内,参考电极和工作电极均浸入电解质中; 在孔内,内聚合物膜,固定的生物界面层和外标本相容的非毒性聚合物膜。 本发明的另一个重要特征是微生物传感器可以容易地被包裹在耐用的保护鞘中。 微生物传感器对于不能混合的样品,例如在未混合流体中的原位化合物或半固体样品,对于原位特别有用。 微生物传感器提供90%的响应时间,小于5秒,通常约1秒,由于搅拌速率的变化,输出电流的变化小于5%,并且在粘性,半固体或多孔固体样品中测量的能力 空间分辨率低至30亩。