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As(III) Determination in the Presence of Pb(II) by Differential Alternative Pulses Voltammetry
Author(s) -
Zlatev Roumen,
Stoytcheva Margarita,
Valdez Benjamin
Publication year - 2010
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.201000090
Subject(s) - hanging mercury drop electrode , voltammetry , mercury (programming language) , chemistry , supporting electrolyte , analytical chemistry (journal) , differential pulse voltammetry , electrolyte , electrochemistry , electrode , cyclic voltammetry , chromatography , computer science , programming language
Differential Alternative Pulses Voltammetry (DAPV), introduced by the authors earlier, was applied with HMDE for direct As(III) determination in the presence of Pb(II) in natural water without sample pretreatment. Distinguishable peaks of As(III) and Pb(II) were registered in 1 M HCl supporting electrolyte at a concentration ratio as high as 1 : 6, while complete peak overlapping occurs applying DPP at any concentration ratio at the same experimental conditions. In‐situ As(III) determinations in the presence of Pb(II) in contaminated ground waters in Mexico were performed, using especially designed disposable safe mercury drop electrodes.