Determination of Iron in Seawater by Adsorptive Stripping Voltammetry
Determination of Iron in Seawater by Adsorptive Stripping Voltammetry
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吸附溶出伏安法测定海水中的铁
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
Young
中科院分区：
文献类型：
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作者：
M. Czae;Kyung Jun Kim;Young
提出了一种简单的程序，成本低廉，灵敏度足以测定海水中的痕量铁，该程序利用铁/儿茶酚复合物在 pH 8.0 的硼酸盐介质中汞滴电极上的吸附积累。最佳条件为：溶液浓度为2 mM邻苯二酚、2.5 mM硼酸盐，pH为8.0，施加-0.25 V积累电位1～3 min，电位扫描采用差分脉冲模式。使用 3 分钟的预浓缩时间，检测限为 1.5 nM Fe。可以消除来自铜的干扰，并且大大改善基线斜率，因为其峰值与所提出的介质中的铁的峰值很好地分离。
A simple procedure, readily available at low cost with a sensitivity sufficient to determine trace levels of iron in seawater is proposed, which utilizes adsorptive accumulation of the iron/catechol complex on the mercury drop electrode in a borate medium of pH 8.0. Optimal conditions include a solution concentration of 2 mM catechol, 2.5 mM borate and a pH of 8.0, an accumulation potential of - 0.25 V is applied for 1∼3 min, and the potential scan is in the differential pulse mode. The limit of detection is 1.5 nM Fe using a preconcentration time of 3 min. The interference from copper can be eliminated and baseline slope is greatly improved, because its peak is well separated from that of iron in the proposed medium.