Naslov
Mineral components and trace elements in ethanolic and supercritical extract of some wild mushrooms

Autori
Vidović, Senka ; Zeković, Zoran ; Mujić, Ibrahim ; Banić Simičić, Jelena ; Jokić, Stela

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
The 6th International Medicinal Mushroom Conference / - , 2011, 104-105

Skup
The 6th International Medicinal Mushroom Conference

Mjesto i datum
Zagreb, Hrvatska, 25.09.2011. - 29.09.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
mushrooms; mineral content; trace elements; ICP-MS

Sažetak
Mushrooms have been an important part of human diet for a thousand years. In recent years the consumption, of especially wild edible mushroom, is increasing greatly. There is also the significant interest in the use of mushrooms and/or their extracts as dietary supplements based on the theories that they enhance immune function and promote health because of significant content of various biologically active compounds. In comparison with vegetables mushrooms could be considerate as a good source of many important mineral elements. The aim of this work was to determine the content of some minerals and trace elements present in extracts obtained by 50% ethanol and supercritical carbon dioxide as extraction solvents. Ethanolic extracts were obtained using ultra sonic bath at extraction temperature of 45°C. Supercritical extracts were obtained using High Pressure Extraction Plant at extraction pressure of 300 bar and temperature of 40 °C. Three wild mushroom species Lactarius deterrimus, Boletus edulis and Collybia platyphlla, from Istra region in Croatia, were investigated. For determination of mineral elements Ca, K, Mg and Na and trace elements Fe, Zn and Se, extract samples were digested in concentrated HNO3 and quantified by inductive coupled plasma mass spectrometry (ICP-MS). Content of K, major mineral element, has been found as very high in all investigated ethanolic mushroom extracts, from 51.75 mg/g for B. edulis to 70.29 mg/g for C. Platyphlla. In all extracts obtained by supercritical carbon dioxide this content was lower than 0, 1 mg/g. Content of K was much higher in comparison to content of Na in all investigated ethanolic extracts, what is very important from nutritional point of view. In extract obtained by supercritical carbon dioxide this was not a case, as content of Na and Ka were very similar. Mg was a second major investigated mineral in B. edulis and L. deterrimus ethanolic extract and third mineral in C. Platyphlla ethanolic extract. In all supercritical extract this content was very low, as in the case of almost all investigated minerals, lower than 0, 05mg/g. Very important is a content of Zn as it is an essential trace element. This content was highest in the B. edulis ethanolic extract, 89.99µg/g. B. edulis was also found to be and the richest source of essential trace element Se. It content was determined as 62.76µg/g. From obtained results it could be concluded that ethanolic extracts of some wild mushrooms could be used as a source of differential minerals and trace elements. Extract obtained using supercritical carbon dioxide contain a low level of all investigated minerals. From investigated extract ethanolic extract of mushroom B. edulis is of importance as it is a source of essential Zn and Se.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

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