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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...
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−1 scan rate, and DP mode were the main parameters. The linear...
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