THE DEVELOPMENT OF NEW MICROELECTRODE GAS SENSORS - AN ODYSSEY .2. O-2 AND CO2 REDUCTION AT MEMBRANE-COVERED GOLD MICRODISK ELECTRODES

被引:32
作者
HAHN, CEW
MCPEAK, H
BOND, AM
机构
[1] Nuffield Department of Anaesthetics, University of Oxford, Radcliffe Infirmary, Oxford
关键词
MICROELECTRODE GAS SENSORS; GOLD MICRODISK ELECTRODES;
D O I
10.1016/0022-0728(95)04027-L
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
In a previous paper we described the reduction of O-2 and CO2, in the presence of each other, at unshielded microdisc electrodes in an aprotic solvent with minimal cross-interference between the competing O-2 and CO2 reduction reactions. In this new work, we describe a practical Clark-type membrane-covered sensor for the simultaneous measurement of O-2 and CO2. The sensor comprises a gold disc microelectrode, housed in a PTFE holder and covered with a PTFE membrane, with dimethylsulphoxide (DMSO) as the solvent and with a silver quasi-reference electrode. The polarizing voltage is swept from 0 to -2.4 V vs. Ag at a typical sweep rate of 0.25 or 0.5 V s(-1) and the O-2 and CO2 concentrations are determined from the limiting currents of the well separated O-2 and CO2 reduction waves. We demonstrate that the addition of up to 10% v/v H2O to the solvent does not appear to compromise the ability of the sensor to analyse O-2 and CO2 simultaneously.
引用
收藏
页码:69 / 74
页数:6
相关论文
共 16 条
[1]   DETERMINATION OF BLOOD-GAS FACTOR OF OXYGEN ELECTRODE USING A NEW TONOMETER [J].
ADAMS, AP ;
MORGANHU.JO .
BRITISH JOURNAL OF ANAESTHESIA, 1967, 39 (02) :107-&
[2]  
ALBERY WJ, 1982, J ELECTROANAL CHEM, V138, P79
[3]   PULSED TITRATION SENSORS .1. A BREATH-BY-BREATH CO2 SENSOR [J].
ALBERY, WJ ;
CLARK, D ;
DRUMMOND, HJJ ;
COOMBS, AJM ;
YOUNG, WK ;
HAHN, CEW .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1992, 340 (1-2) :99-110
[4]  
CLARK LC, 1956, T AM SOC ART INT ORG, V2, P41
[5]  
DOBKIN AB, 1979, DEV NEW VOLATILE INH
[6]   TECHNIQUES FOR MEASURING THE PARTIAL PRESSURES OF GASES IN THE BLOOD .1. INVITRO MEASUREMENTS [J].
HAHN, CEW .
JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS, 1980, 13 (05) :470-482
[7]   TECHNIQUES FOR MEASURING THE PARTIAL PRESSURES OF GASES IN THE BLOOD .2. INVIVO MEASUREMENTS [J].
HAHN, CEW .
JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS, 1981, 14 (07) :783-797
[8]   THE DEVELOPMENT OF NEW MICROELECTRODE GAS SENSORS - AN ODYSSEY .1. O-2 AND CO2 REDUCTION AT UNSHIELDED GOLD MICRODISK ELECTRODES [J].
HAHN, CEW ;
MCPEAK, H ;
BOND, AM ;
CLARK, D .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1995, 393 (1-2) :61-68
[9]   BLOOD-GAS MEASUREMENT [J].
HAHN, CEW .
CLINICAL PHYSICS AND PHYSIOLOGICAL MEASUREMENT, 1987, 8 (01) :3-38
[10]  
HAHN CEW, 1995, Patent No. 838