There is disclosed a pipette-washing device for use with an automatic biochemical analyzer. The pipette-washing device includes a wash fluid-ejecting block for ejecting a wash fluid toward pipette. An upwardly spreading groove is formed in the top surface of the body of the block and extends along the trajectory of the front end of the pipette. The groove is connected at its lower end with the vertical wash fluid channel. A lateral draining channel is formed in the body of the block and connected with the lower end of the vertical wash fluid channel. When the pipette moves, the front end of the pipette moves through the groove. The block is inclined at an angle to the vertical within a plane in which the groove extends.
There is disclosed an automatic biochemical analyzer having a sample turntable and a reaction turntable. Plural sample containers for holding samples are arrayed on the sample turntable. Plural reaction containers are arrayed on the reaction turntable. A sampling pipette draws in a sample from some sampling container and injects the sample into some reaction container. A reagent pipette draws in some reagent from some reagent container and injects the reagent into the same reaction container. The resulting mixture is stirred by a stirring device. Produced reaction products are detected by a detector. Let N be the number of the reaction containers on the reaction turntable. The reaction turntable is rotated in M pitches in one step. Note that M and N do not have any common factor. First and second injecting positions adjacent to each other are established as positions where the reagent pipette can inject a reagent into the reaction container in position. First and second stirring positions adjacent to each other are established as positions where the stirring device can stir liquids in the reaction container in position. The stirring device can be moved between the first and second stirring positions. Thus, one reagent pipette can be used for two kinds of reagents. Also, one stirring device can be used for two kinds of reagents.
G01N 35/02 - Automatic analysis not limited to methods or materials provided for in any single one of groups ; Handling materials therefor using a plurality of sample containers moved by a conveyor system past one or more treatment or analysis stations
G01N 33/50 - Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
G01N 35/00 - Automatic analysis not limited to methods or materials provided for in any single one of groups ; Handling materials therefor
G01N 35/10 - Devices for transferring samples to, in, or from, the analysis apparatus, e.g. suction devices, injection devices