Abstract
Instrumental Neutron Activation Analysis (INAA) and Atomic Absorption Spectroscopy methodology was developed to characterize the hazardous and other inorganic trace element constituents in new and used domestic plastic food containers. INAA due to its non destructive, highly sensitive, multielement and low detection limits characteristics was found to be a good technique for the characterization of polymeric products. Through the variation of irradiation, cooling and counting protocols Al, Ba, Br, Co, Cr, Eu, Fe, Hg, K, Mn, Na, Nd, Sb, Sc, Th, Ti, V and Zn were determined, while Atomic Absorption Spectroscopy was used as complementary technique to quantify toxic inorganic elements such as Cd, Pb and Cu. These elements are thought to originate from the polymer manufacturing processes. It was found that there was gradual increase in the concentration of most of these elements from new to used plastic samples. Moreover it was also observed that these inorganic elements are present in higher concentrations in the lower grade containers as compared to the high quality containers. It was also observed that the good quality containers even with the long usage do not degrade to such an extent as the low quality containers.
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The authors gratefully acknowledge the technical assistance of Mr Yasir Faiz and Mr Lal Habib. We are also grateful to the Reactor Operation group for arranging neutron irradiations of the samples.
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Waheed, S., Rahman, S., Husnain, S.M. et al. Hazardous and other element characterization of new and used domestic plastic food containers using INAA and AAS. J Radioanal Nucl Chem 292, 937–945 (2012). https://doi.org/10.1007/s10967-011-1036-8
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DOI: https://doi.org/10.1007/s10967-011-1036-8