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Automatic enzyme immunoassay apparatus

  • US 4,383,041 A
  • Filed: 10/21/1981
  • Issued: 05/10/1983
  • Est. Priority Date: 10/28/1980
  • Status: Expired due to Fees
First Claim
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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inject cleaning liquid into said test tube after withdrawing liquid by suction from said test tube and discarding the withdrawn liquid;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.

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