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Type :article
Subject :Q Science (General)
ISSN :0013-4686
Main Author :Illyas Md Isa
Additional Authors :Mohamad Idris Saidin
Mustaffa Ahmad
Norhayati Hashim
Suriani Abu Bakar
Noorshida Mohd Ali
M.Si, Suyanta
Title :Chloroplatinum(II) complex-modified MWCNTs paste electrode for electrochemical determination of mercury in skin lightening cosmetics (IR)
Place of Production :Elsevier
Year of Publication :2017
PDF Full Text :The author has requested the full text of this item to be restricted.

Abstract :
The chemically modified multiwalled carbon nanotubes (MWCNTs) paste electrode with chloroplatinum (II) complex for the determination of mercury is presented. The chloroplatinum(II) complex was characterized by nuclear magnetic resonance spectroscopy (NMR), Fourier transforms infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM). The capability of the electron transfer rate on the surface of modified electrode evaluated is by electrochemical impedance spectroscopy (EIS). The square wave stripping voltammetry (SWSV) technique was employed to investigate the performance of chloroplatinum(II) complexMWCNTs paste electrode for determination of mercury. Several operational parameters such as the composition ratios of the electrode, type of supporting electrolyte, pH of the solution, and the SWSV parameters were thoroughly investigated. Under optimal conditions, the linear range obtained was from 5.0mM to 0.1 mM with limit detection of 3.7mM. The interference from other heavy metals such as Ca2+, Mg2+, Ni2+, Zn2+, Cd2+, Co2+, Ba2+, Mn2+, and Ce3+ did not influence the electrochemical response. The chloroplatinum(II) complex-MWCNTs paste electrode was successfully applied to determine mercury in skin lightening cosmetics with a good recovery (98.9%–101.1%).

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