| abstract |
An assay apparatus comprising: i) an assay cartridge ( 52, 53 ) comprising at least one well ( 57 - 62 ) and a pipette ( 50 ) positionable in at least one said well; ii) a holder arranged to receive said cartridge; iii) drive means operable to position said pipette in selected wells of said cartridge; iv) a gas pressure applicator couplable to said pipette whereby to cause liquid flow through said membrane; and v) a radiation detector operable to detect radiation from a well of said cartridge or from said pipette. |