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

被引：7
作者：
Schneider, Alexandre B. [1 ]
Nascimento, Paulo C. [1 ]
Bohrer, Denise [1 ]
de Carvalho, Leandro M. [1 ]
Guarda, Ananda [1 ]
Dias, Daiane [1 ]
Koschinsky, Andrea [2 ]
机构：
[1] Univ Fed Santa Maria, Dept Quim, BR-97105970 Santa Maria, RS, Brazil
[2] Univ Bremen, Sch Sci & Engn, Earth & Space Sci Program, D-28725 Bremen, Germany
来源：
ELECTROANALYSIS | 2013年 / 25卷 / 07期
关键词：
Voltammetry; Zirconium; Seawater; CARBON-PASTE ELECTRODE; PLASMA-MASS SPECTROMETRY; NORTH PACIFIC-OCEAN; TITANIUM; PRECONCENTRATION; ZR; ELEMENTS; NB; TA; HF;
D O I：
10.1002/elan.201300103
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A voltammetric method was developed for zirconium determination as Zr(IV)-cupferron-oxalate-diphenylguanidine complex based on adsorptive accumulation at the HMDE (E-peak=-0.95V). The supporting electrolyte was a mixture of acetate/acetic acid (pH4.6) and ammonium acetate (pH5.7) solutions. E-ads=-0.6V (vs. Ag/AgCl), t(ads)=400s, 10mVs(-1) scan rate, and DP mode were the main parameters. The linear range was 0.033 to 3.3x10(-9)molL(-1), and the LOD and LOQ (t(ads)=400s) were 0.77 and 1.6x10(-11)molL(-1), respectively. The method was adequate for seawater samples, although not sufficiently sensitive for surface waters.
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页码：1628 / 1634
页数：7
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