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Journal of Chemistry
Volume 2013 (2013), Article ID 151395, 6 pages
Research Article

Rapid Microwave Digestion Procedures for the Elemental Analysis of Alloy and Slag Samples of Smelted Ocean Bed Polymetallic Nodules

1Analytical Chemistry Division, National Metallurgical Laboratory, Jharkhand, Jamshedpur 831 007, India
2Control, Research, and Development Department, Uranium Corporation of India Limited, Turamdih, Sundernagar, Jharkhand, Jamshedpur 832 107, India
3P.G. Department of Chemistry, Tata College, Jharkhand, Chaibasa 833 202, India

Received 9 January 2012; Revised 27 May 2012; Accepted 6 June 2012

Academic Editor: Yoshihiro Kudo

Copyright © 2013 Kumari Smita et al. 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.


The use of microwave digester for digestion of alloy and slag samples of smelted ocean bed polymetallic nodules has permitted the complete digestion of samples, thereby replacing the tedious classical methods of digestion of samples. The digestion procedure includes two acid-closed digestions of samples in a microwave oven. Owing to the hazardous nature of perchloric acid, it was not used in developed digestion procedure. Digested sample solutions were analyzed for concentrations of various radicals and the effectiveness of the developed digestion methodology was tested using certified reference materials. It was found that the developed method is giving results comparable with that obtained from conventionally digested samples. In this digestion procedure, time required for digestion of samples was reduced to about 1 hour only from 8-9 hours of conventional digestion.