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E-Journal of Chemistry
Volume 7 (2010), S1, Pages S169-S174
http://dx.doi.org/10.1155/2010/152416

Estimation of Heavy Metals in Multivitamin Tablets by Differential Pulse Anodic Stripping Voltammetry

Kumar Rohit Raj,1 Shashank Sharma,2 Sachin Saxena,2 M. M. Srivastava,1 and Soami P. Satsangi2

1Department of Chemistry, Faculty of Science, Dayalbagh Educational Institute, Agra-282110, India
2USIC, Dayalbagh Educational Institute, Agra-282110, India

Received 9 March 2010; Accepted 3 May 2010

Copyright © 2010 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Differential pulse anodic stripping voltammetry (DPASV) was applied for the simultaneous determination of zinc and copper in multivitamin tablet (supradyn and centrum). Determination of the metals was made in ammonium acetate buffer (pH 4.5) with a scan rate of 0.01 V/s by Hanging Mercury Dropping Electrode (HMDE).The solution was stirred during electrolysis at -1.3 V for 300 s in the potential range of -1.3 to + 0.1 V. Concentrations of zinc and copper in supradyn drug sample were found to be 1.80 and 2.9 mg/tablet and for centrum drug sample were found to be 4.6 and 0.94 mg/tablet respectively.