Mohamad Idris Saidin, Illyas Md Isa, Mustaffa Ahmad, Norhayati Hashim, Azlan Kamari, S. Ab Ghani, Suyanta M. Si
The article reports on a MWCNT paste electrode modified with the fenchone diazine tetracarbonylmolybdenum(0) complex, and on its application to sensitive determination of Cu(II) by using square wave anodic stripping voltammetry. Under optimal conditions and at a typical working voltage of 33 mV (vs. Ag/AgCl), response is linearly related to the concentration of Cu(II) in the 0.1 nM to 1.0 μM range, and the limit of detection is 80 pM. The relative standard deviation [for n = 5 and at a 1.0 μM concentration of Cu(II)] is 3.6 %. Unlike Pb(II), the ions Ni(II), Mg(II), Cd(II), Co(II), Hg(II), and Zn(II) do not strongly interfere. Electrochemical impedance spectroscopy reveals a fast charge transfer at the electrode-solution interface. The method was applied to the analysis of Cu(II) in water samples, and the results agreed well with those obtained by ICP-OES. [Figure not available: see fulltext.] © 2016, Springer-Verlag Wien.
Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjong Malim, 35900, Perak, Malaysia; Nanotechnology Research Centre, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjong Malim, 35900, Perak, Malaysia; Pusat Pengajian Sains Kimia, Universiti Sains Malaysia, USM Pulau, 11900, Pinang, Malaysia; Deparment of Chemistry Education, Faculty of Mathematics and Natural Science, Yogyakarta State University, Yogyakarta, Indonesia
