Automatic enzyme immunoassay apparatus

Claim 1

An automatic enzyme immunoassay apparatus comprising: means for moving a rack holding test tubes containing beads therein, in a lengthwise direction, said rack being held in a cage; means for moving said rack in a direction transverse to said lengthwise direction; means for inserting both a suction nozzle and a cleaning liquid injection nozzle into any of or into a plurality of said test tubes to inject cleaning liquid into said test tube after withdrawing liquid by suction from said test tube and discarding the withdrawn liquid; means for inserting a reaction liquid injection nozzle into said test tube and injecting a reaction liquid into said test tube; means for vibrating said test tube; means for inserting an attraction nozzle into said test tube and pulling said bead out of said test tube, while attracting said bead thereto, and letting said bead fall into a second test tube; means for inserting a substrate injection nozzle and a reaction termination liquid injection nozzle, and injecting a reaction termination liquid into said second test tube after injecting a substrate; means for inserting a nozzle associated with a measuring device into said second test tube and transporting the liquid in said test tube to a measurement device; a spectrophotometer for measuring the absorbance of said liquid; and a printer for recording the measured value of the absorbance.