Meixner Test For Amatoxins
The Meixner test (also known as the Wieland Test) uses concentrated hydrochloric acid and newspaper to test for the deadly poisonous amatoxins found in some species of Amanita, Lepiota, and Galerina.
Psilocin gives a positive Meixner test (100% false positive), therefore the Meixner test cannot differentiate between a hallucinogenic species and a deadly poisonous one.
Read more about this topic: Chemical Tests In Mushroom Identification
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