Premium
Determination of Zirconium and Vanadium in Natural Waters by Adsorptive Stripping Voltammetry in the Presence of Cupferron, Oxalic Acid and 1,3‐Diphenylguanidine
Author(s) -
Schneider Alexandre B.,
Nascimento Paulo C.,
Bohrer Denise,
de Carvalho Leandro M.,
Guarda Ananda,
Krause Cristian,
Wiethan Bruna A.,
Koschinsky Andrea
Publication year - 2015
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201500140
Subject(s) - oxalic acid , vanadium , chemistry , adsorptive stripping voltammetry , zirconium , seawater , nuclear chemistry , cathodic stripping voltammetry , voltammetry , inorganic chemistry , electrochemistry , electrode , geology , oceanography
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, E ads −0.6 and −0.2 V (vs. Ag/AgCl, 3 mol L −1 KCl), t ads 400 and 20 s and 10 and 60 mV s −1 scan rates were used for Zr(IV) and V(V), respectively. E peak 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.