Microfabricated glucose, lactate, glutamate and glutamine thin-film biosensors

被引:0
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作者
Schalkhammer, Th. [1 ]
Lobamaier, Ch. [1 ]
Ecker, B. [1 ]
Wakolbinger, W. [1 ]
Kynclova, E. [1 ]
Hawa, G. [1 ]
Pittner, F. [1 ]
机构
[1] Institut fur biochemie und, molekulare Zellbiologie der Univ, Wien, Vienna, Austria
关键词
Glucose sensors - Ion exchangers - Microelectrodes - Polymerization - Thin films;
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摘要
Glucose, glutamate and lactate oxidase as well as glutaminase were covalently immobilized on thin-film metal electrodes employing a polyimine gel obtained by polymerization of amines and aldehydes. The gel matrix having ion-exchange properties serves an excellent suppression layer for electrochemically interfering compounds. A glutamine sensor was obtained using the glutamate sensor in combination with highly purified immobilized glutaminase from Escherichia coli, pig kidney and Bacillus subtilis. Sensor thus obtained showed rapid response, high stability, excellent suppression of interfering substances and short regeneration time. These sensors were designed for fermentation control in bioreactors using flow-injection-analysis device (FIA). The sensors were also applied for assaying in plasma and whole blood.
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页码:587 / 591
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