A planar pCO2 sensor with enhanced electrochemical properties

被引：11

作者：

Shin, JH ^{[1
]}

Lee, JS ^{[1
]}

Choi, SH ^{[1
]}

Lee, DK ^{[1
]}

Nam, H ^{[1
]}

Cha, GS ^{[1
]}

机构：

[1] Kwangwoon Univ, Dept Chem, Chem Sensor Res Grp, Seoul 139701, South Korea

来源：

ANALYTICAL CHEMISTRY | 2000年 / 72卷 / 18期

关键词：

D O I：

10.1021/ac000427o

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

To develop planar microchemical pCO(2) sensing devices with improved electrochemical properties, we combined two advanced technologies. One is a differential sensor arrangement to simplify the microfabrication procedure by employing pH-sensitive gas-permeable membranes, and the other is the use of an enzyme (carbonic anhydrase) to shorten total measurement time by accelerating the rate of CO2 hydration. The adhesion of the polyurethane-matrix gas-permeable membrane is enhanced significantly by incorporating a silanizing reagent (silicon tetrachloride), improving the stability and extending sensor lifetime. The proposed differential pCO(2) microelectrodes exhibited significantly improved performance in their preconditioning period, response and recovery times, stability, response slope, and lifetime.

引用

页码：4468 / 4473

页数：6

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