Title of article :
Cathodic Stripping Voltammetric Determination of Essential Element (Copper and Zinc) in Drinking Water
Author/Authors :
Pardi, Hilfi Department of Chemistry Education - Faculty of Teacher Training - Education Raja Ali Haji Maritime University, Senggarang, Tanjungpinang, Indonesia , Deswati Department of Chemistry - Faculty of Mathematics and Natural Science - Andalas University, Padang, Indonesia , Suyani, Hamzar Department of Chemistry - Faculty of Mathematics and Natural Science - Andalas University, Padang, Indonesia , Widya Edelwis, Tri Department of Chemistry - Faculty of Mathematics and Natural Science - Andalas University, Padang, Indonesia
Abstract :
In this work, a selective and sensitive method to the determination of essential
elements Cu and Zn in drinking water proposed by adsorptive stripping differential pulse
cathodic voltammetry (AdSDPCV) using Alizarin (AZ) as a ligand. The complexes of
metals-AZ were deposited onto a hanging mercury drop electrode (HMDE) and the resulting
current was analyzed. Increase peak current of metals-AZ obtained optimization condition of
pH 6, AZ concentration0.04 mmol/L, supporting electrolyte concentration0.5 mol/L, potential
for adsorptive deposition (Eads) -0.1 V, the time for adsorptive deposition (tads)70 s,
respectively, the instrumental parameters (drop size of mercury 8 and scan rate 800 ms/V). The
linearity of metals were160 ng/L and 200 ng/L, the limit of detection 0.1 ng/L for Cu and 0.05
ng/L for Zn, respectively. Relative standard deviation (RSD) 0.5% for Cu and 0.7% for Zn and
recovery Cu and Zn in the range 98 to 101%, respectively. The applicability of AdSDPCV
methods is successfully for determination of metals in drinking water.
Keywords :
Drinking water , Differential pulse , Alizarin , Heavy metal , Adsorptive stripping differential pulse cathodic voltammetry
Journal title :
Astroparticle Physics
