P. Mattila et al., Contents of vitamins, mineral elements, sand some phenolic compounds in cultivated mushrooms, J AGR FOOD, 49(5), 2001, pp. 2343-2348
The aim of the study was to determine the contents of mineral elements (Ca,
K, Mg, Na, P, Cu, Fe, Mn, Cd, Pb, and Se), vitamins (B-1, B-2, B-12, C, D,
folates, and niacin), and certain phenolic compounds (flavonoids, lignans,
and phenolic acids) in the cultivated mushrooms Agaricus bisporus/white, A
garicus bisporus/brown, Lentinus edodes, and Pleurotus ostreatus. Selenium,
toxic heavy metals (Cd, Pb), and other mineral elements were analyzed by E
TAAS, ICP-MS, and ICP methods, respectively; vitamins were detected by micr
obiological methods (folates, niacin, and vitamin B12) or HPLC methods (oth
er vitamins), and phenolic compounds were analyzed by HPLC (flavonoids) or
CC-MS methods (lignans and phenolic acids). Cultivated mushrooms were found
to be good sources of vitamin B-2,niacin, and folates, with contents varyi
ng in the ranges 1.8-5.1, 31-65, and 0.30-0.64 mg/100 g dry weight (dw), re
spectively. Compared with vegetables, mushrooms proved to be a good source
of many mineral elements, e.g., the contents of K, P, Zn, and Cu varied in
the ranges 26.7-47.3 g/kg, 8.7-13.9 g/kg, 47-92 mg/kg, and 5.2-35 mg/kg dw,
respectively. A. bisporus/brown contained large amounts of Se (3.2 mg/kg d
w) and the levels of Cd were quite high in L. edodes (1.2 mg/kg dw). No fla
vonoids or lignans were found in the mushrooms analyzed. In addition, the p
henolic acid contents were very low.