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Determination of metals in a multicomponent system by differential pulse and alternating current anodic stripping voltammetry
Author(s) -
Locatelii Clinio,
Vasca Ermanno,
Bighi Corrado,
Fagioli Francesco,
Garai Tibor
Publication year - 1996
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.1140080213
Subject(s) - saturated calomel electrode , anodic stripping voltammetry , analytical chemistry (journal) , dropping mercury electrode , chemistry , reference electrode , electrode , mercury (programming language) , hanging mercury drop electrode , supporting electrolyte , working electrode , voltammetry , stripping (fiber) , copper , electrolyte , electrochemistry , inorganic chemistry , materials science , chromatography , organic chemistry , composite material , computer science , programming language
A combination of sensitive and selective voltammetric methods, namely differential pulse (DPASV) and fundamental and second harmonic alternating current anodic stripping voltammetry (ACASV) were found to be very suitable techniques for the simultaneous determination of metal species having half‐wave potentials close to one another. The simultaneous determination of traces of Cu II , Bi III , Sb III , Pb II , Cd II and Sn II is described using 0.1 M HCl as the supporting electrolyte with the subsequent addition of 0.02 M EDTA or 1.0 M NaOH (for the analysis of Cu II , Sb III and Sn II , respectively). A semistationary mercury electrode (long lasting sessile drop mercury electrode) was used as the working electrode. A saturated calomel electrode (SCE) and a platinum electrode were used as the reference and auxiliary electrodes, respectively. The analytical procedure was verified with the analysis of standard reference material NBS‐SRM 631 Spectrographic Zinc Spelter LVl. Precision and accuracy, expressed as relative standard deviation and relative error, respectively, were 3 to 5%, while the detection limits were of the order of 10 −8 to10 −10 M in the case of element examined.