A light addressable photoelectrochemical cyanide sensor

被引：48

作者：

Licht, S ^{[1
]}

Myung, N ^{[1
]}

Sun, Y ^{[1
]}

机构：

[1] CLARK UNIV,DEPT CHEM,WORCESTER,MA 01610

来源：

ANALYTICAL CHEMISTRY | 1996年 / 68卷 / 06期

关键词：

D O I：

10.1021/ac9507449

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A sensor is demonstrated that is capable of spatial discrimination of cyanide with use of only a single stationary sensing element, Different spatial regions of the sensing element are light activated to reveal the solution cyanide concentration only at the point of illumination. In this light addressable photoelectrochemical (LAP) sensor the sensing element consists of an n-CdSe electrode immersed in solution, with the open-circuit potential determined under illumination. In alkaline ferro-/ferricyanide solution, the open-circuit photopotential is highly responsive to cyanide, with a linear response of (120 mV) log [KCN]. LAP detection with a spatial resolution of +/-1 mm for cyanide detection is demonstrated. The response is almost linear for 0.001-0.100 m cyanide with a resolution of 5 mV.

引用

页码：954 / 959

页数：6

共 38 条

[1] POTENTIOMETRIC DETERMINATION OF CHLORIDES WITH AN AIR-GAP CYANIDE SENSOR [J].