鱼类肾脏中汞离子的伏安法测定
Voltammetric Assay of Mercury Ion in Fish Kidneys.
作者信息
Ly Suw Young
机构信息
Biosensor Research Institute, Seoul National University of Technology, Seoul, 139-743 Korea.
出版信息
Toxicol Res. 2008 Mar;24(1):23-28. doi: 10.5487/TR.2008.24.1.023. Epub 2008 Mar 1.
Abstract
Voltammetric analysis of mercury ions was developed using paste electrodes (PEs) with DNA and carbon nanotube mixed electrodes. The optimized analytical results of the cyclic voltammetry (CV) of the 1∼14 ng L Hg(II) concentration and the square wave (SW) stripping voltammetry of the 1∼12 ng L Hg(II) working range within an accumulation time of 400 seconds were obtained in 0.1 M NHHPO electrolyte solutions of pH 4.0. For the relative standard deviations of the 1 ng L Hg(II), which were observed at 0.078% (n = 15) at the optimum conditions, the low detection limit (S/N) was pegged at 0.2 ng L (7.37 × 10M) for Hg(II). The results can be applied to assays in biological fish kidneys and wastewater samples.
摘要
利用含DNA和碳纳米管混合电极的糊剂电极（PEs）开展了汞离子的伏安分析。在pH为4.0的0.1 M磷酸氢二铵电解质溶液中，获得了1∼14 ng/L Hg(II)浓度的循环伏安法（CV）以及1∼12 ng/L Hg(II)工作范围在400秒积累时间内的方波（SW）溶出伏安法的优化分析结果。对于1 ng/L Hg(II)的相对标准偏差，在最佳条件下为0.078%（n = 15），Hg(II)的低检测限（S/N）确定为0.2 ng/L（7.37×10⁻¹¹ M）。该结果可应用于生物鱼肾和废水样品的检测。
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