====== Meixner Test ======

  - Squeeze a drop of juice from the mushroom onto absorbent, high lignin content paper (newspaper). Stool or gastric sample should be diluted with methanol, spun and filtered.
  - Mark the perimeter of the spot with a pencil
  - Dry the spot
  - Add 2 drops of concentrated hydrochloric acid to the area.
  - If the paper goes blue it indicates the presence of amatoxins. A control drop of acid can be added to another area of the paper.
  - The reaction may take up to 20 minutes for trace amounts of toxins