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Concentrations of heavy metals (Cu, Cd, Pb, Zn, Mn, Fe, Cr and Ni) were determined in wild-grown edible mushrooms. The mushroom samples were collected from Tokat in the Middle Black Sea region of Turkey. The analyses were performed using a Perkin–Elmer Analyst 700 Atomic Absorption Spectrometer. The results indicated that the levels of heavy metals in mushrooms were high in some species. The level of Cu was the highest in Agaricus bisporus as 107 ± 8.5 μg/g. The levels of Cd, Pb, Zn and Mn conformed to the FAO/WHO (1976) standards. Fe content was higher than other metals in all mushroom species. The concentrations of Cr were highest in Marasmius oreades, Armillaria mellea and Morchella elata in this study. The highest Ni contents were observed in Armillaria mellea, Marasmius oreades, Morchella vulgaris and Agaricus bisporus. [Copyright &y& Elsevier]

Contents of Fe, Cu, Mn, Zn, Pb, and Cd in 10 mushrooms species from Tokat, Turkey were determined by atomic absorption spectrometry. The results indicate that Fe, Cu, Mn, and Pb levels in the species Fomes fementarius were the highest with means of 3904±307 mg/kg, 54±4 mg/kg, 64±5 mg/kg, 2.7±2.0 mg/kg, respectively. The highest level of Zn was 122±11 mg/kg in the species Polyporus frondosus. Content of Cd in Boletus appendiculatus and Fomes fomentarius were the highest with a mean of 1.8±0.2 mg/kg. [Copyright &y& Elsevier]

Abstract: A solid phase extraction procedure based on biosorption of copper(II), lead(II), zinc(II), iron(III), nickel(II) and cobalt(II) ions on Aspergillus fumigatus immobilized Diaion HP-2MG has been investigated. The analytical conditions including amounts of A. fumigatus, eluent type, flow rates of sample and eluent solutions were examined. Good recoveries were obtained to the spiked natural waters. The influences of the concomitant ions on the retentions of the analytes were also examined. The detection limits (3sigma, N =11) were 0.30μgl−1 for copper, 0.32μgl−1 for iron, 0.41μgl−1 for zinc, 0.52μgl−1 for lead, 0.59μgl−1 for nickel and 0.72μgl−1 for cobalt. The relative standard deviations of the procedure were below 7%. The validation of the presented procedure is performed by the analysis of three standard reference materials (NRCC-SLRS 4 Riverine Water, SRM 1515 Apple leaves and GBW 07605 Tea). The procedure was successfully applied for the determination of analyte ions in natural waters microwave digested samples including street dust, tomato paste, black tea, etc. [Copyright &y& Elsevier]