Baldrianova L, Svancara I, Economou A, Sotiropoulos S
Department of Analytical Chemistry, Faculty of Chemical-Technology, University of Pardubice, CZ-532 10 Pardubice, Czech Republic.
Anal Chim Acta. 2006 Oct 27;580(1):24-31. doi: 10.1016/j.aca.2006.07.051. Epub 2006 Jul 29.
Carbon and gold microdisc electrodes (30 and 10 microm, respectively) have been tested as substrates for in situ bismuth film plating from unstirred solutions of variable acetate buffer content and were subsequently used in the anodic stripping voltammetry determination of Pb(II) and Cd(II) ions. The effects of Bi(III) concentration, analyte accumulation time, stirring as well as supporting electrolyte content have been studied. Under optimal conditions good voltammetric responses were obtained by means of square wave anodic stripping voltammetry in unstirred analyte solutions of 5 x 10(-8) to 10(-6)M, even in the absence of added buffer. In an indicative application, Pb(II) ion levels were determined in tap water using bismuth-plated carbon microdisc electrodes.
分别为30微米和10微米的碳微盘电极和金微盘电极已被测试作为从不同醋酸盐缓冲液含量的未搅拌溶液中原位镀铋膜的基底，并随后用于阳极溶出伏安法测定Pb(II)和Cd(II)离子。研究了Bi(III)浓度、分析物积累时间、搅拌以及支持电解质含量的影响。在最佳条件下，通过方波阳极溶出伏安法在5×10(-8)至10(-6)M的未搅拌分析物溶液中，即使在没有添加缓冲液的情况下也能获得良好的伏安响应。在一个指示性应用中，使用镀铋碳微盘电极测定了自来水中的Pb(II)离子水平。
