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  • Title: The selenium content of edible mushrooms in Finland.
    Author: Piepponen S, Liukkonen-Lilja H, Kuusi T.
    Journal: Z Lebensm Unters Forsch; 1983; 177(4):257-60. PubMed ID: 6685955.
    Abstract:
    In this investigation the selenium contents of 142 mushroom samples were determined. The majority of the samples were wild Finnish mushroom species generally used for human consumption. The selenium contents of some cultivated mushrooms were also determined. In all, the material analyzed consisted of 38 different mushroom species. Selenium concentrations were assayed after modified wet and dry ashing, by atomic-absorption spectrometry using the hydride technique and the standard-addition procedure. The reliability of the method was tested with certified standard reference materials. The results of analysis obtained indicate that selenium contents vary considerably between different mushroom species. Of the species investigated, by far the highest selenium contents were found in Boletus edulis (mean 17 mg/kg dry weight). Other mushrooms having considerable selenium contents included Macrolepiota (5.0 mg/kg), wild Agaricus spp. (2.7 mg/kg), Gasteromycetes (1.9 mg/kg), Lactarius torminosus (1.9 mg/kg) and Marasmius oreades (1.6 mg/kg). The contents in these mushrooms are sufficient to provide an amount of selenium that is nutritionally significant in relation to the total daily intake of selenium of the Finnish population. Other edible mushrooms generally used in Finnland, e.g. species belonging to Cantharellaceae, Russula, Boletaceae (other than B. edulis) and Lactarius (other than L. torminosus) contained only small amounts of selenium. The importance of these mushrooms as a source of selenium is therefore marginal. The selenium content of Lactarius torminosus decreased by an average of 32% during the blanching necessary before consumption of these mushrooms.
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