Determination of Zirconium and Vanadium in Natural Waters by Adsorptive Stripping Voltammetry in the Presence of Cupferron, Oxalic Acid and 1,3-Diphenylguanidine
Determination of Zirconium and Vanadium in Natural Waters by Adsorptive Stripping Voltammetry in the Presence of Cupferron, Oxalic Acid and 1,3-Diphenylguanidine
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DOI：
10.1002/elan.201500140
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发表时间：
2015-08
期刊：
影响因子：
3
通讯作者：
Alexandre Schneider;P. C. Nascimento;D. Bohrer;L. M. Carvalho;A. Guarda;C. Krause;Bruna Avila Wiethan;A. Koschinsky
中科院分区：
文献类型：
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作者：
Alexandre Schneider;P. C. Nascimento;D. Bohrer;L. M. Carvalho;A. Guarda;C. Krause;Bruna Avila Wiethan;A. Koschinsky
基于Zr（IV）和V(V)作为铜铁-草酸-1,3-二苯基胍（COD）配合物在HMDE上的积累，采用顺序AdSV法测定了不同离子强度样品中这些金属的痕量。Zr（IV）和V(V)分别采用DP模式，Eads−0.6和−0.2 V(vs. Ag/AgCl, 3mol L−1 KCl)， tads 400和20s以及10mv和60mv s−1扫描速率。峰值分别为- 0.95 （Zr(IV)-COD）和- 0.65 V（V(V)-COD）。该方法应用于河流、河口（在德国和巴西）以及沿海和开阔海水的样本。
A sequential AdSV method based on the accumulation of Zr(IV) and V(V) as cupferron-oxalic acid-1,3-diphenylguanidine (COD) complexes at the HMDE was used to determine traces of these metals in samples with different ionic strengths. DP mode, Eads −0.6 and −0.2 V (vs. Ag/AgCl, 3 mol L−1 KCl), tads 400 and 20 s and 10 and 60 mV s−1 scan rates were used for Zr(IV) and V(V), respectively. Epeak were −0.95 (Zr(IV)-COD) and −0.65 V(V(V)-COD). The methodology was applied in samples of rivers, estuaries (in Germany and Brazil) and coastal and open seawater.