Bifunctional polydopamine@Fe3O4 core-shell nanoparticles for electrochemical determination of lead(II) and cadmium(II).
The present paper has focused on the potential application of the bifunctional polydopamine@Fe3O4 core-shell nanoparticles for development of a simple, stable and highly selective electrochemical method for metal ions monitoring in real samples. The electrochemical method is based on electrochemical preconcentration/reduction of metal ions onto a polydopamine@Fe3O4 modified magnetic glassy carbon electrode at -1.1 V (versus SCE) in 0.1 M pH 5.0 acetate solution containing Pb(2+) and Cd(2+) during 160 s, followed by subsequent anodic stripping. The proposed method has been demonstrated highly selective and sensitive detection of Pb(2+) and Cd(2+), with the calculated detection limits of 1.4×10(-11)M and 9.2×10(-11) M. Under the optimized conditions, the square wave anodic stripping voltammetry response of the modified electrode to Pb(2+) (or Cd(2+)) shows a linear concentration range of 5.0-600 nM (or 20-590 nM) with a correlation coefficient of 0.997 (or 0.994). Further, the proposed method has been performed to successfully detect Pb(2+) and Cd(2+) in aqueous effluent.
['Song|Qian|Q|', 'Li|Maoguo|M|', 'Huang|Li|L|', 'Wu|Qikang|Q|', 'Zhou|Yunyou|Y|', 'Wang|Yinling|Y|']
D001672:Biocompatible Materials D002104:Cadmium D055664:Electrochemical Techniques D005296:Ferrous Compounds D007211:Indoles D007854:Lead D058185:Magnetite Nanoparticles D011108:Polymers
Cadmium ions Lead ions Magnetic nanoparticle Polydopamine Simultaneous determination