HUANG Ya-ning,ZHANG Chen,CHEN Xi.Thin Layer Electrolytic Flow Cell for On-line Electrochemical Detection of Cd2+ and Pb2+[J].Journal of Instrumental Analysis,2025,44(04):720-725.
A thin-layer electrochemical flow detection system is developed for the analysis of Cd
2+
and Pb
2+
in water by differential pulse stripping anode stripping voltammetry(DPASV) in ship or buoy applications. The stability and sensitivity of the electroanalytical system are also investigated. After optimized the flow cell structure and applied the modified electrode using multi-wall carbon nanotube,a detection limit of 0.02 μg/L for Cd
2+
and 0.17 μg/L for Pb
2+
could be obtained,with linear range of 0.2-100 μg/L. The electroana
lytical system can be preliminarily applied to the on-line determination of Cd
2+
and Pb
2+
in water. In order to further improve the detection sensitivity,pyrrole electropolymerized conductive modified electrode was employed,by which thiourea was involved in the polymerization to introduce sulfur groups to increase the adsorption capacity of Pb
2+
.The detection limit is found to be 0.03 μg/L,and the linear range is 0.1-100 μg/L for Pb
2+
with recoveries of 93.3%- 110%. The system has been successfully applied to the on-line determination of Pb
2+
in water after the optimization of instrumental conditions.
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references
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Related Author
HUANG Ya-ning
ZHANG Chen
CHEN Xi
姚淑艳
王宗花
张菲菲
夏建飞
夏延致
Related Institution
Information Center,Xiamen Huaxia University,Xiamen
Institute of Analytical Technology and Smart Instruments and College of Environment and Public Healthy,Xiamen Huaxia University,Xiamen
College of Chemistry and Chemical Engineering, Xiamen University,Xiamen