Amanita Muscaria from Poland have increased level of muscimol and ibotenic acid

Determination of muscimol and ibotenic acid in mushrooms of Amanitaceae by capillary electrophoresis: In this study, method for rapid quantitative and qualitative determination of ibotenic acid and muscimol in Amanita mushrooms naturally grown in Poland was developed. The investigations included the species of Amanita muscaria, Amanita pantherina, and Amanita citrina, collected in southern region of Poland. The studied hallucinogenic compounds were effectively extracted with amixture of methanol and 1mM sodium phosphate buffer at pH 3 (1:1 v/v) using ultrasound-assisted procedure. The content of both substances significantly exceeded the concentration reported by Tsujikawa and Gonmoriet. in the mushrooms of genus Amanita muscaria. Concentration of MUS reached up to 1,362 mg/g, whereas the content of IBO reached up to 2,983 mg/g.
Details in paper: “Determination of muscimol and ibotenic acid in mushrooms of Amanitaceae by capillary electrophoresis”
http://www.researchgate.net/publication/263548687_Determination_of_muscimol_and_ibotenic_acid_in_mushrooms_of_Amanitaceae_by_capillary_electrophoresis