Dissolution test equipment and methods for testing having improved filtration system

• US 20070092404A1
• Filed: 10/20/2006
• Published: 04/26/2007
• Est. Priority Date: 10/25/2005
• Status: Abandoned Application

• Current Assignee: Lyn Hughes
• Original Assignee: Lyn Hughes
• Inventors: Hughes, Lyn
• Application Number:
  US11/584,161
• Publication Number:
  US 20070092404A1
• Time in Patent Office: Days
• US Class Current: 422/68.1
• CPC Class Codes: G01N 13/00 Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects scanning-probe techniques or apparatus G01Q
• CPC Class Codes: G01N 2013/006 Dissolution of tablets or the like
• CPC Class Codes: G01N 2035/00198 Dissolution analysers
• CPC Class Codes: G01N 33/15 Medicinal preparations ; Physical properties thereof, e.g. dissolubility
• CPC Class Codes: Y10T 436/255 including use of a solid sorbent, semipermeable membrane, or liquid extraction

Abstract

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.

Claims

1. A dissolution test apparatus comprising:

a first chamber connected in series to at least a second chamber, wherein the first chamber is capable of transferring solid test samples to the second chamber and the second chamber is capable of retaining the solid test samples;

a first reservoir and at least a second reservoir for continuously supplying one or more media into the first chamber and the second chamber, respectively, the chambers having a stirrer for mixing the solid test samples and the media together;

wherein the second chamber has a filter membrane overlying a base of the second chamber, the filter membrane being supported by a filter support, the filter support being provided between the filter membrane and the base of the second chamber to prevent distortion of the filter membrane; and

a processor for analyzing an effluent from the chambers.

2. The apparatus of claim 1 wherein the first chamber has another filter membrane overlying a base of the first chamber, the another filter membrane being supported by another filter support, the another filter support being provided between the another filter membrane and the base of the first chamber to prevent distortion of the another filter support.

3. The apparatus of claim 1 further comprising an O-ring to secure the filter membrane to the base of the second chamber.

4. The apparatus of claim 1 wherein the filter support is a metal mesh screen.

5. The apparatus of claim 1 wherein the first chamber comprises simulated gastric fluid.

6. The apparatus of claim 1 wherein the second chamber comprises simulated intestinal fluid.

7. The apparatus of claim 1 further comprising a third chamber connected in series to the second chamber for receiving the effluent from the second chamber.

8. The apparatus of claim 1 further comprising a third reservoir connected to the second chamber for supplying a solution for adjusting a pH of the media in the second chamber.

9. A dissolution test apparatus comprising:

a first chamber connected in series to at least a second chamber, wherein the first chamber is capable of transferring solid test samples to the second chamber and the second chamber is capable of retaining the solid test samples;

a first reservoir and at least a second reservoir for continuously supplying one or more media into the first chamber and the second chamber, respectively;

a filter membrane provided in a base of the first and second chambers, the base having ridges formed thereon;

a filter support provided over the ridges to prevent distortion of the filter membrane; and

a processor for analyzing an effluent from the chambers.

10. A method for dissolution testing comprising:

transferring solid test samples from a first chamber connected in series to at least a second chamber, wherein the second chamber is capable of retaining the solid test samples;

continuously supplying one or more media into the first chamber and the second chamber from a first reservoir and at least a second reservoir, respectively;

mixing the solid test samples and the media together;

filtering the solid test samples through a filter membrane supported by a filter support, the filter support overlying a base of the first and second chambers to prevent distortion of the filter membrane; and

analyzing an effluent from the chambers.