the present invention provides a dissolution test apparatus comprising , a first chamber 2 connected in series to at least a second chamber 10 , wherein the first chamber 2 is capable of transferring solid test samples to the second chamber 10 and the second chamber 10 is capable of retaining the solid test samples . further , the apparatus includes a first reservoir 21 and at least a second reservoir 22 for continuously supplying one or more media into the first chamber 2 and the second chamber 10 , respectively , the chambers having stirrers 4 , 11 for mixing the solid test samples and the media together . in addition , the second chamber 10 has a filter membrane 45 overlying a base 44 of the second chamber 10 , the filter membrane 45 being supported by a filter support 46 , the filter support 46 being provided between the filter membrane 45 and the base 44 of the second chamber 10 to prevent distortion of the filter membrane 45 . processors 5 , 16 , 20 for analyzing an effluent from the chambers are also provided .