Direct Determination of Zinc, Cadmium, Lead, Copper Metal in Tap Water of Delhi (India) by Anodic Stripping Voltammetry Technique

Nicola Pirrone,J. Raj,T. D. Dogra,Mohineesh Mohineesh,Anupuma Raina

doi:10.1051/e3sconf/20130109009

Nicola Pirrone, J. Raj + Show 3 more

Open Access

https://doi.org/10.1051/e3sconf/20130109009

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Abstract

Salts of Zinc, Cadmium, Lead and Copper are taken incidentally or accidently and has become of great toxicological importance having toxic effect. In the present study direct determination of Zn, Cd, Pb and Cu metal was carried out from tap water of Delhi (India) using differential pulse anodic stripping Voltammeter (DPASV) at Hanging mercury dropping electrode (HMDE).Determination of Zn, Cd, Pb, Cu was done using Ammonium acetate buffer (pH 4.6) with a sweep rate (scan rate) of 59.5 mV/s and pulse amplitude 50mV by HMDE by standard addition method. The solution was stirred during pre-electrolysis at -1150mV (vs. Ag/AgCl) for 90 seconds and the potential was scanned from -1150V to +100V (vs..Ag/AgCl). As a result the minimum level of Zn, Cd, Pb, Cu was Zero and the concentration observed in the tap water sample of Delhi (India) was determined as 0.174 mg/L-1, 0.001 mg/L-1, 0.002 mg/L-1, 0.011 mg/L-1 respectively.

Highlights

Metals are elements, present in chemical compounds as positive ions, or in the form of cat-ions (+ ions) in solution
As a result the minimum level of Zn, Cd, Pb, Cu was Zero and the concentration observed in the tap water sample of Delhi (India) was determined as 0.174 mg/L-1, 0.001 mg/L-1, 0.002 mg/L-1, 0.011 mg/L-1 respectively
The concentration of the zinc, Cadmium, Lead,Copper metal in the tap water were successfully determined by ASV technique .The concentration of Zn(II), Cd, Pb, Cu in tap water of Delhi (India) were found to be 0.174 mg/L-1, 0.001 mg/L-1, 0.002 mg/L-1, 0.011 mg/L1 respectively

Summary

Introduction

Present in chemical compounds as positive ions, or in the form of cat-ions (+ ions) in solution. Heavy metals are grouped within the category of environmental toxins and the investigations of these toxic heavy metals such as Fe, Mn, Cu, Zn, Co, Ba, and Ag, As, Cd, Cr, Hg, Ni, Pb, Sb, and Se place special importance on environmental samples ( Abollino et al 2000, Novotry et al ,2000). These heavy metals are much toxic and have tendency to accumulate in the body and may result in chronic damage. Several other methods are used routinely in addition to DPASV, such as Atomic Absorption Spectrometry (AAS) and X-ray fluorescence spectrometry, Inductive coupled plasma, but advantages of using DAPSAV are that it is a successful, new, rapid, simple, selective and inexpensive for qualitative and quantitative determinations of heavy metals. (Farrukh A. et al, 2006)

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