As(III) Determination in the Presence of Pb(II) by Differential Alternative Pulses Voltammetry |
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Authors: | Roumen Zlatev Margarita Stoytcheva Benjamin Valdez |
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Institution: | Instituto de Ingeniería, Universidad Autónoma de Baja California, Blvd. B. Juárez s/n, 21280?Mexicali, Baja California, México |
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Abstract: | 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. |
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Keywords: | As(III) determination Differential alternative pulses voltammetry (DAPV) Safe disposable mercury drop electrode Arsenic |
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