The toxicity of Amanita phalloides preserved in vinegar brine was investigated. Amanitins were detected in the water extract (up to 90% of toxins), but only minor levels were found in the brine, and none in fruit body tissue after removal of the brine. Lignin test and chromatographic methods were used.
Klán J., Baudišová D. (1990): Toxicity of Amanita phalloides (Fr.) Link in a vinegar brine. – Česká Mykologie 44(4): 225–227.