CHEMICALLY MODIFIED ION-SENSITIVE FIELD-EFFECT TRANSISTORS - ELIMINATION OF THE LIQUID JUNCTION POTENTIAL IN A DOUBLE SENSOR FLOW-INJECTION ANALYSIS CELL

被引：12

作者：

COBBEN, PLHM

EGBERINK, RJM

BOMER, JG

SCHOUWENAAR, R

BRZOZKA, Z

BOS, M

BERGVELD, P

REINHOUDT, DN

机构：

[1] UNIV TWENTE,CHEM ANAL LAB,7500 AE ENSCHEDE,NETHERLANDS

[2] UNIV TWENTE,BIOINFORMAT LAB,7500 AE ENSCHEDE,NETHERLANDS

来源：

ANALYTICA CHIMICA ACTA | 1993年 / 276卷 / 02期

关键词：

FLOW INJECTION; ION SELECTIVE ELECTRODES; SENSORS; ION-SENSITIVE FIELD EFFECT TRANSISTORS; LEAD; POTASSIUM;

D O I：

10.1016/0003-2670(93)80403-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A flow-through cell was designed that can be used for flow-injection analysis with two chemically modified ion-sensitive field-effect transistors (CHEMFETs) in close proximity. This offers the possibility of a differential measurement without influence of the liquid junction potential. The differential signal of a potassium- and a sodium-selective CHEMFET responded in a Nernstian manner and selectively towards potassium in an excess (fixed) concentration of sodium. A highly lead-selective CHEMFET was used in the same flow cell in combination with a potassium-selective CHEMFET.

引用

页码：347 / 352

页数：6

共 18 条

[1] THE OPERATION OF AN ISFET AS AN ELECTRONIC DEVICE [J].