Patent ID: 6929782

Claim:
A dissolution test sample holder immersible within a liquid for measuring the dissolution or release rate of a test sample in said liquid, said holder comprising: a tubular body having opposed ends, one of said ends being open; an end cap removably attached to said one end, said end cap having a peripheral side wall coaxially interengaged with said body and a flange extending substantially perpendicularly inwardly of said side wall and forming a support surface within said end cap, said flange surrounding and defining an aperture through said end cap; a porous membrane positioned within said end cap on said support surface and covering said aperture; a ring sized to fit coaxially within said end cap contiguous with said membrane, said membrane being sandwiched between said support surface and said ring, said ring having a predetermined thickness and an inner perimeter defining a volume holding said test sample in contact with said membrane; said one end of said body being immersible to bring said membrane into contact with said liquid, said test sample passing though said porous membrane upon immersion and dissolving in said liquid.