title: Bifunctional polydopamine@Fe3O4 core-shell nanoparticles for electrochemical determination of lead(II) and cadmium(II).
abstract: 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.
authors.affiliation: Anhui Key Laboratory of Chemo/Biosensing, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Song
authors.forename: Maoguo
authors.initials: M
authors.lastname: Li
authors.forename: Li
authors.initials: L
authors.lastname: Huang
authors.forename: Qikang
authors.initials: Q
authors.lastname: Wu
authors.forename: Yunyou
authors.initials: Y
authors.lastname: Zhou
authors.forename: Yinling
authors.initials: Y
authors.lastname: Wang
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry; D002104:Cadmium / Q000032:analysis / Q000737:chemistry*; D055664:Electrochemical Techniques / Q000379:methods*; D005296:Ferrous Compounds / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D007854:Lead / Q000032:analysis / Q000737:chemistry*; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D005296:Ferrous Compounds; D007211:Indoles; D058185:Magnetite Nanoparticles; D011108:Polymers; C568283:polydopamine; D002104:Cadmium; D007854:Lead; C034236:ferrous oxide
keywords: Cadmium ions; Lead ions; Magnetic nanoparticle; Polydopamine; Simultaneous determination