Automatic chemical analyzing method and apparatus

An automatic chemical analyzing apparatus comprising

• a holding means for holding a train of cuvettes each permeable to light;
• a means for sending a sample cup containing a liquid sample to the intake position;
• a means for transferring said liquid sample from said sample cup in said intake position to any cuvette held by said holding means;
• a light measuring means for applying light to any cuvette and measuring the light having passed through the cuvette;
• a driving means for driving said holding means in such a manner that a first and a second operations are sequentially performed, said first operation starting to convey a cuvette at rest at the starting point on said holding means and said second operation bringing said cuvette to a halt in the position ahead of said starting point after said cuvette has traversed the light path in said light measuring apparatus;
• a means for adding reagent to a cuvette located at a specific position while said train of cuvettes are at rest;
• a control means for obtaining a first measured value from a cuvette by said light measuring apparatus and storing said first measured value in a memory when said cuvette does not contain at least one of sample and reagent, and for obtaining a second measured value from said cuvette by said apparatus and storing said second measured value in said memory when said cuvette contains both sample and reagent;
• and
• a display means for displaying the concentration of any analysis item in accordance with the difference between said first and second measured values.

An automatic chemical analyzing apparatus comprising

• a holding means for holding a train of cuvettes each permeable to light;
• a means for sending a sample cup containing a liquid sample to the intake position;
• a means for transferring said liquid sample from said sample cup in said intake position to any cuvette held by said holding means;
• a light measuring means for casting light upon any cuvette and measuring the light having passed through the cuvette;
• a driving means for driving said holding means in such a manner that a first and a second operations are sequentially performed, said first operation starting to convey a cuvette at rest at the starting point and said holding means and said second operation bringing said cuvette to a halt in the position ahead of said starting point after said cuvette has traversed the light path in said light measuring apparatus;
• a means for adding reagent to a cuvette located at a specified position while said train of cuvettes are at rest;
• a means for pouring blank solution into said cuvette;
• a control means for obtaining a first measured value from a cuvette by said light measuring apparatus and storing said first measured value in a memory when said cuvette contains only said blank solution, and for obtaining a second measured value from said cuvette by said apparatus and storing said second measured value in said memory when said cuvette contains both sample and reagent;
• and
• a display means for displaying the concentration of any analysis item in accordance with the difference between said first and second measured values.

An automatic chemical analyzing apparatus comprising

• a turntable for holding a train of cuvettes each permeable to light;
• a means for sending a sample cup containing a liquid sample to the intake position;
• a means for transferring the sample from said sample cup in said intake position to any of said cuvettes held by said turntable;
• a light measuring means for casting light upon a cuvette and measuring the light having passed through said cuvette;
• a disc disposed coaxial with the rotary shaft of said turntable, having perforations corresponding to said cuvettes held by said turntable;
• a position detecting means having a light source and a light receiving element disposed on both sides of the peripheral portion of said disc;
• a driving means for rotating said turntable in response to every rotation instruction signal until said position detecting means detects a predetermined number of said perforations, said predetermined number being greater than the number of said perforations cut in said disc,
• a means for putting reagent into a cuvette in a specified position while said train of cuvettes are at rest;
• a control means for detaining a first measured value from a cuvette by said light measuring apparatus and storing said first measured value in a memory when said cuvette does not contain at least one of sample and reagent, and for obtaining a second measured value from said cuvette by said apparatus and storing said second measured value in said memory when said cuvette contains both sample and reagent, said control means delivering said rotation instruction signal to said driving means;
• and
• a display means for displaying the concentration of any analysis item in accordance with the difference between said first and second measured values.