Voltammetric Determination of Cr(VI) Using Gold Nanoparticles-modified Glassy Carbon Electrode

Abstract Gold nanoparticles-modified glassy carbon electrode was utilized in the present study to determine trace amount of Cr(VI). The steps employed in the present study were fabrication of gold nanoparticles colloids, modification of glassy carbon electrode using the gold nanoparticle colloids, and voltammetric determination of Cr(VI) using the modified electrode. The results of the present study indicate that 290μL of 0.1M NaBH4 was required to form gold nanoparticles colloids. Self assembly process was found to give better gold nanoparticles binding onto glassy carbon electrode compared to adsorption process as indicated by more gold nanoparticles attached onto the glassy carbon electrode. Modification of the glassy carbon electrode using gold nanoparticles increase sensitivity as indicated by good limit of detection (2.38 ng/L) with an acceptable linearity range within 0.050 – 0.250μg/L. The correlation coefficient and precision of the method were 0.9948 and 99.14%, respectively.

[1]  Camellia Panatarani,et al.  Fabrication Of Gold Nanoparticles-Modified Glassy Carbon Electrode And Its Application For Voltammetric Detection Of Cr(III) , 2015 .

[2]  S. Hirata,et al.  Determination of chromium(III) and total chromium in seawater by on-line column preconcentration inductively coupled plasma mass spectrometry , 2000 .

[3]  B. Gammelgaard,et al.  Improvement on simultaneous determination of chromium species in aqueous solution by ion chromatography and chemiluminescence detection , 1997 .

[4]  Olga Domínguez-Renedo,et al.  Electrochemical determination of chromium(VI) using metallic nanoparticle-modified carbon screen-printed electrodes. , 2008, Talanta.

[5]  A. Safavi,et al.  Indirect determination of hexavalent chromium ion in complex matrices by adsorptive stripping voltammetry at a mercury electrode. , 2006, Talanta.

[6]  J. Nóbrega,et al.  Evaluation of solid sampling high-resolution continuum source graphite furnace atomic absorption spectrometry for direct determination of chromium in medicinal plants , 2012 .

[7]  D. Schiffrin,et al.  Self-Organization of Nanosized Gold Particles , 1998 .

[8]  Y. Einaga,et al.  Construction of two-dimensional arrays gold nanoparticles monolayer onto boron-doped diamond electrode surfaces , 2006 .

[9]  Hailiang Jiang,et al.  Ionic liquid as a complexation and extraction medium combined with high-performance liquid chromatography in the evaluation of chromium(VI) and chromium(III) speciation in wastewater samples , 2011 .

[10]  R. M. Cespón-Romero,et al.  Preconcentration and speciation of chromium by the determination of total chromium and chromium(III) in natural waters by flame atomic absorption spectrometry with a chelating ion-exchange flow injection system , 1996 .

[11]  O. Domínguez Renedo,et al.  Optimisation procedure for the inhibitive determination of chromium(III) using an amperometric tyrosinase biosensor , 2004 .

[12]  K. Janardhanam,et al.  Speciation determination of chromium(III) and (VI) using preconcentration cloud point extraction with flame atomic absorption spectrometry (FAAS). , 2008, Journal of hazardous materials.

[13]  K. Vytras,et al.  Catalytic adsorptive stripping voltammetry versus electrothermal atomic absorption spectrometry in the determination of trace cobalt and chromium in human urine. , 2005, Talanta.

[14]  A. Economou,et al.  Trace Determination of Chromium by Square-Wave Adsorptive Stripping Voltammetry on Bismuth Film Electrodes , 2004 .

[15]  A. Türker,et al.  Separation and speciation of Cr(III) and Cr(VI) with Saccharomyces cerevisiae immobilized on sepiolite and determination of both species in water by FAAS. , 2000, Talanta.

[16]  Mayumi Kaneko,et al.  Flow-injection determination of chromium(III) by its catalysis on the oxidative coupling of 3-methyl-2-benzothiazolinone hydrazone with N-ethyl-N-(2-hydroxy-3-sulfopropyl)-3-methoxyaniline , 2002 .

[17]  B. Tang,et al.  Rapid and sensitive spectrofluorimetric determination of trace amount of Cr(III) with o-vanillin-8-aminoquinoline. , 2004, Talanta.

[18]  G. Frens.  Controlled Nucleation for the Regulation of the Particle Size in Monodisperse Gold Suspensions , 1973 .

[19]  Min Wang,et al.  A study of nanostructured gold modified glassy carbon electrode for the determination of trace Cr(VI) , 2008 .