Amperometric sensor for simultaneous determination of Cd2+ and Pb2+

Shengshui Hu; Kangbing Wu; Hongchao Yi; Dafu Cui

doi:10.1117/12.440186

14 September 2001 Amperometric sensor for simultaneous determination of Cd²⁺and Pb²⁺

Shengshui Hu, Kangbing Wu, Hongchao Yi, Dafu Cui

Proceedings Volume 4414, International Conference on Sensor Technology (ISTC 2001); (2001) https://doi.org/10.1117/12.440186
Event: International Conference on Sensing units and Sensor Technology, 2001, Wuhan, China

Abstract

In this paper, a kind of amperometric sensors for simultaneous determination of Cd²⁺ and Pb²⁺ was investigated. Cd²⁺ and Pb²⁺ are firstly deposited on the surface of the sensor at -1.20 V and then reduced. In the following step, reduced Cd and Pb are oxidized by scanning the potential towards a positive direction. The experimental parameters, which influence sensitivity and detection limit, such as supporting electrolyte and pH values, accumulation potential and accumulation time, scan rate, were examined. The mechanism as to the voltammetric response of this sensor was discussed. This sensor has following advantages: easy and convenient fabrication, low cost, low detection limit and fast response. The detection limits are 5 X 10^-11 mol/L for Cd²⁺ and 8 by 10^-11 mol/L for Pb²⁺.

Citation Download Citation

Shengshui Hu, Kangbing Wu, Hongchao Yi, and Dafu Cui "Amperometric sensor for simultaneous determination of Cd²⁺and Pb²⁺", Proc. SPIE 4414, International Conference on Sensor Technology (ISTC 2001), (14 September 2001); https://doi.org/10.1117/12.440186

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