IRIDIUM OXIDE PH MICROELECTRODE

被引：56

作者：

VANHOUDT, P

LEWANDOWSKI, Z

LITTLE, B

机构：

[1] MONTANA STATE UNIV,NATL SCI FDN,INTERFACIAL MICROBIAL PROC ENGN RES CTR,BOZEMAN,MT 59717

[2] NAVAL RES LAB DETACHMENT,STENNIS SPACE CTR,BAY ST LOUIS,MS 39529

来源：

BIOTECHNOLOGY AND BIOENGINEERING | 1992年 / 40卷 / 05期

关键词：

PH MEASUREMENT; MICROELECTRODES; MICROENVIRONMENTS; BIOFILMS;

D O I：

10.1002/bit.260400507

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The manufacture, calibration, and signal conditioning during construction of an iridium/iridium oxide pH microsensor is described. The microsensor was designed to be used extracellularly, primarily in biofilm research. The sensing tip diameters were typically in the range of 3-15-mu-m. The iridium oxide was formed by potential cycling in dilute sulfuric acid. A pH profile across a denitrifying biofilm was measured as an example of an application. The higher Nernstian slope (70-80 mV/pH for fresh electrodes), increased rigidity, and restriction of the sensing tip to the outermost end of the electrode are features which make the iridium/iridium oxide pH microelectrode superior to a glass microelectrode.

引用

页码：601 / 608

页数：8

共 35 条

[1] PROPERTIES OF THERMALLY PREPARED IRIDIUM DIOXIDE ELECTRODES [J].