Patent ID: 8783089

Claim:
A test system for determining the solution rate and release kinetics of aerosol formulations, comprising: an inhaler ( 1 ), which is connected to a cascade impactor ( 3 ), while a hydrophilic membrane ( 6 ) is disposed on a filter plate of the cascade impactor ( 3 ) and is charged with particles, a Franz diffusion cell ( 13 ) into which the hydrophilic membrane ( 6 ) is disposed after being charged in the cascade impactor ( 3 ), wherein a first compartment ( 11 ) for receiving a liquid release medium is disposed underneath the hydrophilic membrane ( 6 ) and an air chamber is formed as a second compartment 12 above the hydrophilic membrane ( 6 ) within the Franz diffusion cell ( 13 ), and wherein the hydrophilic membrane ( 6 ) is in contact with a release medium, and a device for measurement data acquisition wherein medium from the first compartment is carried, wherein the hydrophilic membrane ( 6 ) comprises a material selected from among acrylic copolymer, polyethylene sulphone, polysulphone, cellulose, cellulose derivatives, cellulose esters and regenerated cellulose, and the hydrophilic membrane ( 6 ) has a maximum thickness of 100 μm.