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Electrochemical Determination of Cd 2+ and Pb 2+ Using NSAID‐mefenamic Acid Functionalized Mesoporous Carbon Microspheres Modified Glassy Carbon Electrode
Author(s) -
Thinakaran N.,
Subramani S. E.,
Priya T.,
Dhanalakshmi N.,
Vineesh T. V.,
Kathikeyan V.
Publication year - 2017
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201700200
Subject(s) - nafion , electrode , electrochemistry , detection limit , mesoporous material , anodic stripping voltammetry , metal ions in aqueous solution , materials science , nuclear chemistry , glassy carbon , stripping (fiber) , voltammetry , analytical chemistry (journal) , selectivity , inorganic chemistry , metal , cyclic voltammetry , chemistry , chromatography , catalysis , biochemistry , composite material , metallurgy
This paper describes the electrochemical behaviors of Cd 2+ and Pb 2+ on the proposed mesoporous carbon microspheres/mefenamic acid/nafion modified glassy carbon electrode (MC/MA/Nafion/GC) studied by square wave anodic stripping voltammetry (SWASV). The prepared material is characterized by XRD, SEM, FTIR, RAMAN and BET analysis. Experimental parameters, such as the deposition potential and time, the pH value of buffer solution were optimized. Under the optimized conditions, the electrode responded linearly to Cd 2+ and Pb 2+ in the concentration range from 50 to 300 nM, and the detection limits were 24.2 and 11.26 nM respectively. The sensitivity determined was 0.0623 μA/nM (Cd 2+ ) and 0.192 μA/nM (Pb 2+ ). Multiple metal ion detection with clear demarcation of peaks was produced by the electrode. Moreover, the modified electrode has possessed good selectivity and reproducibility of Cd 2+ and Pb 2+ detection. We also investigated the interference of various anions and surfactants for the detection of Cd 2+ and Pb 2+ ions. Finally the modified electrode was used to detect the presence of metal ions in practical samples and the results obtained are comparatively good with respect to AAS.