期刊名称：Journal of Environmental Analytical Chemistry
电子版ISSN：2380-2391
出版年度：2017
卷号：4
期号：4
页码：1-5
DOI：10.4172/2380-2391.1000222
语种：English
出版社：OMICS International
摘要：There is presently lack of data on composition of potentially toxic metals and their leaching from clay based foodwares into food. Therefore, in present study we evaluated the leaching of cadmium, chromium, copper, manganese, nickel, lead and zinc from raw clays and traditional clay pots from two locations, Ara-Ekiti, Ekiti State and Kono-Boue, Rivers State in Nigeria. Samples were digested with aqua regia and analysed using atomic absorption spectrometry and also with energy dispersive X-ray fluorescence. Tap water set at different temperatures (27°C and 100°C) and pH values (4.2 and 9.2) were used to leach the pots. The pH of the raw clays ranges from 2.08-6.50. The order of concentrations is Fe>Mn>Pb>Zn>Ni>Cr>Cu>Cd for both clays and this was consistent with the XRF data. The results from this study indicate that Cd, Cr, Cu and Pb were not in leachable forms in clay pots. The clay pots indicated varying leachability for Fe and Mn. The concentration ranges of Fe and Mn leached were 0.16-8.37 ppm and 0.08-10.00 ppm, respectively. In all cases the Kono-Boue pots indicated more leached concentrations of metals than Ara-Ekiti pots. It is essential to assess traditional clay pots for leachability of xenobiotics.
