Fabrication Of Gold Nanoparticles-Modified Glassy Carbon Electrode And Its Application For Voltammetric Detection Of CrIII
Journal: International Journal of Scientific & Technology Research (Vol.4, No. 1)Publication Date: 2015-01-15
Authors : Santhy Wyantuti; Yeni Wahyuni Hartati; M. Lutfi Firdaus; Camellia Panatarani; Roekmiati Tjokronegoro;
Page : 135-139
Keywords : Keywords Gold nanoparticles; glassy carbon electrode; trivalent chromium; voltammetry.;
Abstract
Abstract A sensitive and selective differential pulse stripping voltammetric DPSV method is presented for the determination of trace amount CrIII using glassy carbon electrode GCE modified with gold nanoparticles AuNPs. The method includes AuNPs fabrication and self-assembly GCE modification. This processes replaced the H groups with NH2 groups on the surfaces of GCE which increased the number of AuNPs attached to it. The GCE modified with AuNPS was used as electrochemical sensor of CrIII for the first time that gave a wide linear range from 0.5 to 75 ppb and a very low detection limit of 10 ppt equivalent to 0.19 nM. The electrode exhibited high reproducibility in repetitive measurements with a relative standard deviation better than 2.4. The effect of interfering ions study showed that CuII CdII ZnII CrVI NiII and FeIII ions did not have a significant effect on the measurement.
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Last modified: 2015-06-28 04:07:41