Analytical Sciences

Abstract − Analytical Sciences, 22(6), 871 (2006).

Wax-Impregnated Carbon Paste Electrode Modified with Mercuric Oxalate for the Simultaneous Determination of Heavy Metal Ions in Medicinal Plants and Ayurvedic Tablets
Ronald J. MASCARENHAS,*1 Ashis K. SATPATI,*2 Shivaraj YELLAPPA,*3 Bailure S. SHERIGARA,*3 and Ajjikuttira K. BOPIAH*4
*1 Department of Chemistry, St. Joseph's College, Lalbagh Road, Bangalore-560 027, Karnataka, India
*2 Analytical Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, Maharashtra, India
*3 Department of Post-Graduate Studies and Research in Industrial Chemistry, Kuvempu University, Jnana Sahyadri, Shankaraghatta-577 451, Shimoga, Karnataka, India
*4 Department of Botany, St. Joseph's College, Lalbagh Road, Bangalore-560 027, Karnataka, India
A wax-impregnated carbon paste electrode with mercury oxalate as the bulk modifier is found to be suitable for the determination of heavy metal ions by differential pulse anodic stripping voltammetry. The contents of binder and modifier have been optimized, until they showed low background current and easy renewability. The bulk-modified electrode is applied for the simultaneous determination of Zn, Cd, Pb and Cu in medicinal plants and Ayurvedic tablets (Liv 52). The results obtained have been validated with HMDE and AAS and are found to be comparable.