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http://dx.doi.org/10.1021/ac049232x

has been cited by the following article:

• TITLE: Determination of ppt Level Chromium(VI) Using the Gold Nano-Flakes Electrodeposited on Platinum Rotating Disk Electrode and Modified with 4-Thiopyridinium

  AUTHORS: Huy Du Nguyen, T. Thuy Luyen Nguyen, Khac Manh Nguyen, T. Anh Tuyet Tran, Anh Mai Nguyen, Quoc Hien Nguyen

  KEYWORDS: Nano-Gold Layer, Platinum Electrode, Stripping Voltammetry

  JOURNAL NAME: American Journal of Analytical Chemistry, Vol.6 No.5, April 17, 2015

  ABSTRACT: The nano-gold layer formed on the platinum rotating disk electrode (nano-Au/Pt-RD) inherited the catalytic property for Cr(VI) reduction from platinum surface and owned the good features of nano-gold such as insensitivity with hydrogen ion, high surface area, augmenting diffusion of Cr(VI) and ability for self-assembling with 4-pyridine-ethanethiol (PET) through Au←S linkages, to form PET/nano-Au/Pt-RD electrode capable of accumulating Cr(VI) from sample. The obtained PET/ nano-Au/Pt-RD electrode showed an extreme sensitivity to Cr(VI). By using this electrode, 1.09 ng·L﹣1 was the detection limit of differential pulse adsorptive cathodic stripping voltammetry for Cr(VI) with the accumulation time of only 2 min. Moreover, this electrode was reproducible with 3.5% RSD for 30 times of Cr(VI) accumulating and stripping. In addition, this electrode was also selective for Cr(VI) determination, which was not almost interfered by other inorganic ions.