Dispenser operation verification apparatus and verification method

Abstract

An object is to provide a dispenser operation verification apparatus and verification method that enables operation with high reliability and high accuracy. The construction is such that with a dispenser comprising: one or a plurality of transparent or semi-transparent liquid passages capable of liquid suction, discharge and storage; a pressure control device for controlling the pressure in the liquid passage; a transport device for effecting relative movement between a container and the liquid passage; and an operation instruction device for issuing operating instructions to the pressure control device and the transport device, the operation of the dispenser is verified by providing; a detecting device for detecting an optical condition of the liquid passage, a movable region thereof or a part of that region, and a judgement device for judging the result of the instruction related to the liquid passage issued by the operation instruction device, based on the optical conditions detected by the detecting device.

1 . A dispenser operation verification method, wherein a dispenser comprising: one or a plurality of transparent or semi-transparent liquid passages capable of liquid suction, discharge and storage; pressure control means for controlling the pressure in the liquid passage; transport means for effecting relative movement between a container and the liquid passage; and operation instruction means for issuing operating instructions to said pressure control means and said transport means, is used and verification of the operation of the dispenser is effected by having; 
 an operating step for performing operations related to said liquid passage,    a detection step for detecting an optical condition of said liquid passage a movable region thereof or a part of that region, and    a judgement step for judging the result of the instruction related to an operation of agitation by sucking and discharging the liquid into or from the liquid passage respectively issued by said operation instruction means, based on the optical conditions of the contents of the liquid passage detected by said detection step and instructing to the operation instruction means based on the result of the judgement.    
     
     
         2 . A dispenser operation verification method according to  claim 1 , wherein said judgement step judges the result of the instruction, based on information besides said optical condition, selected from amongst information containing; operation information related to the operation instructions of said operation instruction means, object information related to objects which said dispenser draws in, discharges and stores, and device information related to said dispenser including the liquid passage.  
     
     
         3 . A dispenser operation verification method according to  claim 2 , wherein said operation information contains: suction amount or discharge amount; presence of suction or discharge; speed of suction or discharge; suction and discharge operation including time of suction or discharge; and/or information on movement operation including movement path, movement direction and/or movement distance, said object information contains the kind or nature of liquid and/or the type and/or the presence of suspensions such as magnetic particles and the like, and said device information contains the nature and shape of the liquid passage and/or information showing the relationship between the distance from a suction aperture and the capacity of said liquid passage.  
     
     
         4 . A dispenser operation verification method according to  claim 1 , wherein said detection step has a step for receiving light at one or a plurality of locations, from said liquid passage, said movable region or a part of the region.  
     
     
         5 . A dispenser operation verification method according to  claim 4 , wherein in the case where said liquid passage is capable of upward and downward movement, and in the case where said light receiving means is fixedly provided outside of the upward and downward movement path of said liquid passage such that an optical axis thereof is directed toward a predetermined height location of the upward and downward movement path, said detecting step detects the lower edge of the liquid passage and up to the upper level to where the liquid can be stored while performing the upward and downward movement by said transport means.  
     
     
         6 . A dispenser operation verification method according to  claim 1 , wherein said detection step is performed by receiving light emitted toward said liquid passage, the movable region or a part of the regions.  
     
     
         7 . A dispenser operation verification method according to  claim 1 , wherein said detecting step is performed by picking up an image of said liquid passage, a movable region thereof or a part of the region.  
     
     
         8 . A dispenser operation verification method according to  claim 1 , wherein said detecting step receives light spanning the maximum width of the upward and downward movement path so that the light from the maximum width of one or a plurality of the upward and downward movement paths of said liquid passage can be received or picked up.  
     
     
         9 . A dispenser operation verification method according to  claim 1 , wherein said detecting step shines light on the maximum width of one or a plurality of the upward and downward movement paths of said liquid passage.  
     
     
         10 . A dispenser operation verification method according to  claim 1 , wherein said judgement step judges whether or not conditions related to the liquid passage corresponds to the instruction result, by analyzing the optical pattern composed of: the light amount, the light intensity or the image; temporal fluctuations of the light amount, the light intensity or the image; or the spatial distribution of the light amount, the light intensity or the image, detected by said detecting step.  
     
     
         11 . A dispenser operation verification method according to  claim 10 , wherein conditions related to the condition of the liquid passage includes, the concentration of air bubbles or a suspension such as a magnetic particles in the liquid passage, the degree of suspension or mixing of the liquid in the liquid passage, or a reaction condition such as light emission.  
     
     
         12 . A dispenser operation verification method according to  claim 6 , wherein said judgment step judges, in the case of a light emitting level where the amount or intensity of the light received in said detecting step is almost the same as the amount or intensity of the light from light emission, that there is no liquid passage present, and in the case of a predetermined shielding level where the amount or intensity of the light received in said detecting step is smaller than the amount or intensity of the light from said light emission, that a liquid passage is present.  
     
     
         13 . A dispenser operation verification method according to  claim 1 , wherein said judgment step judges, based on a time difference between a time that said pressure control means is instructed to draw in a suction amount of liquid up to a predetermined height of said liquid passage and a time that the amount or intensity of the light detected in said detecting step actually changes, a condition of liquid flow resistance or a condition of blockage by foreign matter in said liquid passage.  
     
     
         14 . A dispenser operation verification method according to  claim 10 , wherein said judgement step, after detecting the liquid surface by said detection step, judges the condition of the liquid during the operation of suction into or discharge from the liquid passage, by analyzing a suction and discharge operation by pressure control means, as well as an optical pattern composed of the light amount, the light intensity or the image; temporal fluctuations of the light amount, the light intensity or the image; or spatial distribution of the light amount, the light intensity, or the image, detected in said detecting step.  
     
     
         15 . A dispenser operation verification method according to  claim 1 , wherein said judgement step, in the condition where the liquid is drawn up to lower than a predetermined height in said liquid passage, by raising said liquid passage or lowering said detecting means, judges the size of the volume drawn into said liquid passage, based on the distance moved to where the liquid surface in said liquid passage crosses the detecting location of said detecting means, and information showing the relationship between a predetermined optional distance from said suction aperture and the capacity of said liquid passage.  
     
     
         16 . A dispenser operation verification method according to  claim 1 , wherein said judgement step, in the condition where the liquid is drawn into said liquid passage, by raising said liquid passage or lowering said detecting means, detects the liquid surface twice before it reaches the tip of the liquid passage, and also in the condition where the liquid is drawn up to a higher level than said predetermined height, by raising said liquid passage or lowering said detecting means, judges a liquid shortage in the case where a change is detected from a condition with liquid present to a condition with liquid again absent.  
     
     
         17 . A dispenser operation verification method according to  claim 1 , wherein said dispenser also has magnetic means outside of said liquid passage capable of applying and removing a magnetic field to and from each liquid passage, and said operation instruction means also instructs said magnetic means to apply and remove a magnetic field, and said judgement step also judges the instruction result made by said magnetic field in relation to the liquid passage.  
     
     
         18 . A dispenser operation verification method according to  claim 1 , wherein said liquid passage is a pipette tip detachably mounted on a nozzle provided on the dispenser, and said dispenser has a detaching device for the pipette tip, and said operation instruction means also gives said transport means and said detaching device an instruction to attach and detach the pipette tip, and said judgement step judges the result of the instruction of attaching and the pipette tip.  
     
     
         19 . A dispenser operation verification method according to  claim 1 , further comprises a step of adding a coloring matter having the absorption maximum nearby the wave length of the light from an emission means or an optical source or a suspension agent capable of dispersing insoluble solid substance with the liquid for aiding in or capable of detection, to the liquid being sucked, discharged or stored in the liquid passage before the detection step.