Analytical Research Laboratory, Department of Chemistry, University of Sistan & Baluchestan, PO Box 98155-147, Zahedan, Iran.
Talanta. 2010 Mar 15;80(5):1657-64. doi: 10.1016/j.talanta.2009.10.005. Epub 2009 Oct 12.
A silver hexacyanoferrate nanoparticles/carbon nanotubes modified glassy carbon electrode was fabricated and then successfully used for the simultaneous determination of ascorbic acid, dopamine and uric acid by cyclic voltammetry. A detailed investigation by transmission electron microscopy (TEM) and electrochemistry was performed in order to elucidate the preparation process and properties of the nanocomposites. The size of silver hexacyanoferrate nanoparticles was examined by TEM around 27 nm. Linear calibration plots were obtained over the range of 4.0 x 10(-6)-7.8 x 10(-5), 2.4 x 10(-6)-1.3 x 10(-4) and 2.0 x 10(-6)-1.5 x 10(-4) mol L(-1) with detection limits of 4.2 x 10(-7),1.4 x 10(-7) and 6.0 x 10(-8) mol L(-1) for ascorbic acid, dopamine and uric acid, respectively. The practical analytical utilities of the modified electrode were demonstrated by the determination of ascorbic acid, dopamine and uric acid in urine and human blood serum samples.
一种银六氰合铁酸盐纳米粒子/碳纳米管修饰玻碳电极被制备，并通过循环伏安法成功用于同时测定抗坏血酸、多巴胺和尿酸。通过透射电子显微镜（TEM）和电化学对纳米复合材料的制备过程和性质进行了详细的研究。TEM 检查了银六氰合铁酸盐纳米粒子的尺寸约为 27nm。在 4.0 x 10(-6)-7.8 x 10(-5)、2.4 x 10(-6)-1.3 x 10(-4) 和 2.0 x 10(-6)-1.5 x 10(-4) mol L(-1)范围内得到了线性校准曲线，检测限分别为 4.2 x 10(-7)、1.4 x 10(-7) 和 6.0 x 10(-8) mol L(-1)，用于抗坏血酸、多巴胺和尿酸。通过测定尿液和人血清样本中的抗坏血酸、多巴胺和尿酸，证明了修饰电极的实际分析用途。
