Determination of the Natural Dissolved Concentration of Zirconium in Seawater by Adsorptive Stripping Voltammetry

Determination of the Natural Dissolved Concentration of Zirconium in Seawater by Adsorptive Stripping Voltammetry
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吸附溶出伏安法测定海水中锆的自然溶解浓度

DOI:
10.1002/elan.201300103
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发表时间:
2013
期刊:
影响因子:
3
通讯作者:
Andrea Koschinsky
Andrea Koschinsky
中科院分区:
化学4区
文献类型:
--
作者:
Schneider;Paulo C. Nascimento;Denise Bohrer;Leandro M. de Carvalho;Ananda Guarda;Daiane Dias;Andrea Koschinsky

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建立了一种基于吸附累积的伏安法测定锆的方法:Zr(IV) -铜铁-草酸盐-二苯胍络合物(Epeak= - 0.95 V)。支撑电解质为乙酸/乙酸(pH 4.6)和乙酸铵(pH 5.7)溶液的混合物,主要参数为eads = - 0.6 V (vs. Ag/AgCl),tads=400 s, 10 mV s - 1扫描速率和DP模式。线性范围为0.033 ~ 3.3×10−9mol L−1,odandloq (tads=400 s)分别为0.77和1.6×10−11mol L−1。该方法适用于海水样品,但对地表水不够敏感。
A voltammetric method was developed for zirconium determination as Zr(IV)‐cupferron‐oxalate‐diphenylguanidine complex based on adsorptive accumulation at the HMDE (Epeak=−0.95 V). The supporting electrolyte was a mixture of acetate/acetic acid (pH 4.6) and ammonium acetate (pH 5.7) solutions.Eads=−0.6 V (vs. Ag/AgCl),tads=400 s, 10 mV s−1scan rate, and DP mode were the main parameters. The linear range was 0.033 to 3.3×10−9mol L−1, and theLODandLOQ(tads=400 s) were 0.77 and 1.6×10−11mol L−1, respectively. The method was adequate for seawater samples, although not sufficiently sensitive for surface waters.
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