yam_anthocyanin

Tried to filter (Z1) with vacuum on ground-glass kitasato+buchner and aquarium pump.  Clogged filter after a few drops of light brownish filtrate (Z3).  Returned unfiltered part to beaker.

Added to (Z1) 5 g of Al2(SO4)3 dissolved in water and filtrated to remove cloudiness.  Result (Z2) is brown paste.

Tried to filter again.  Clogged again after a few drops of clear colorless filtrate, added to (Z3).  

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