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首页> 外文期刊>Electroanalysis >Sequential Voltammetric Determination of Uranium, Cadmium and Lead by Using the ex situ Bismuth Film Electrode: Application to Phosphate Fertilizers
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Sequential Voltammetric Determination of Uranium, Cadmium and Lead by Using the ex situ Bismuth Film Electrode: Application to Phosphate Fertilizers

机译：异位铋膜电极伏安法伏安法测定铀，镉和铅：在磷肥中的应用

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摘要

A sequential voltammetric procedure for the determination of uranium, cadmium and lead was investigated at an ex situ bismuth film electrode (BiFE). First, the adsorptive stripping voltammetry was applied to assay the U(VI)-cupferron complex in the differential pulse mode (detection limit of 1.0 mu gL(-1), 200 s accumulation time). Through the manipulation of the same aliquot of the sample, efforts were made to quantify cadmium and lead by square wave anodic stripping voltammetry. Detection limits of 2.03 mu gL(-1) for Cd (II) and 2.43 mu gL(-1) for Pb (II) were calculated (100 s accumulation time). The methodology was successfully applied to phosphate fertilizer samples after open vessel wet decomposition (HNO3/H2O2). The following value ranges were evaluated: U (VI) 37.2-150 mgkg(-1), Pb (II) 78.3-204 mgkg(-1) and Cd (II) 44.1-71.6 mgkg(-1). Validation was performed by using the standard reference materials SRM-695 - phosphate fertilizer - and SRM-1643e - water.
机译：在异位铋薄膜电极（BiFE）上研究了顺序伏安法测定铀，镉和铅。首先，采用吸附溶出伏安法以微分脉冲模式（检测限为1.0μgL（-1），累积时间为200 s）测定U（VI）-铜铁复合物。通过对样品的等分试样进行操作，努力通过方波阳极溶出伏安法对镉和铅进行定量。计算了镉（II）的检出限2.03μgL（-1）和铅（II）的检出限2.43μgL（-1）（100 s累积时间）。该方法已成功应用于开放容器湿法分解（HNO3 / H2O2）后的磷肥样品。评估了以下值范围：U（VI）37.2-150 mgkg（-1），Pb（II）78.3-204 mgkg（-1）和Cd（II）44.1-71.6 mgkg（-1）。通过使用标准参考材料SRM-695（磷酸盐肥料）和SRM-1643e（水）进行验证。

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