Bismuth film electrode for anodic stripping voltammetric determination of tin
Bismuth film electrode for anodic stripping voltammetric determination of tin
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DOI：
10.1016/j.aca.2006.07.075
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发表时间：
2006-11-24
影响因子：
6.2
通讯作者：
Ogorevc, Bozidar
中科院分区：
文献类型：
--
作者：
Hutton, Emily A.;Hocevar, Sarno B.;Ogorevc, Bozidar
铋膜电极（BiFE），结合阳极溶出伏安法，提供了方便的测量低浓度锡。该过程包括在含铋离子、儿茶酚作为络合剂和金属分析物的非脱氧模型溶液中，同时在玻碳衬底电极上原位形成铋膜电极，以及锡的电化学沉积，然后进行阳极剥离扫描。BiFE的特点是具有吸引人的电分析性能，具有两个不同的伏安溶出信号，对应于锡，伴随着低背景贡献。对铋离子和儿茶酚浓度、沉积电位、沉积时间和模型溶液pH等实验参数进行了优化。此外，还与裸露的玻璃碳和汞膜电极进行了关键的比较，揭示了BiFE测量锡的优越特性。BiFE在1 ~ 100 μ g L-1锡浓度范围内呈高度线性关系（R-2 = 0.997）， LoD为0.26 μ g L-1锡，重现性好，10 μ g L-1锡（n = 10）的计算rsd为7.3%。以实际海水样品中锡含量的测定为例，验证了该方法的实用性。(c) 2005 Elsevier B.V.版权所有
The bismuth film electrode (BiFE), in combination with anodic stripping voltammetry, offers convenient measurement of low concentrations of tin. The procedure involves simultaneous in situ formation of the bismuth film electrode on a glassy carbon substrate electrode, together with electrochemical deposition of tin, in a non-deaerated model solution containing bismuth ions, catechol as complexing agent and the metal analyte, followed by an anodic stripping scan. The BiFE is characterized by an attractive electroanalytical performance, with two distinct voltammetric stripping signals corresponding to tin, accompanied with low background contributions. Several experimental parameters were optimized, such as concentration of bismuth ions and catechol, deposition potential, deposition time and pH of the model solution. In addition, a critical comparison is given with bare glassy carbon and mercury film electrodes, revealing the superior characteristics of BiFE for measurement of tin. BiFE exhibited highly linear behavior in the examined concentration range from 1 to 100 mu gL(-1) of tin (R-2 = 0.997), an LoD of 0.26 mu g L-1 tin, and good reproducibility with a calculated R.S.D. of 7.3% for 10 mu g L-1 tin (n = 10). As an example, the practical applicability of BiFE was tested with the measurement of tin in a real sample of seawater. (c) 2005 Elsevier B.V. All rights reserved.