Abstract:
An automatic analytical apparatus for effecting quantitative analysis of a given substance contained in a sample such as blood, urine or the like and comprising a sample holding and carrying means including a plurality of sample holding positions and operative to carry the sample held by one of the sample holding positions more than one round along a closed loop, a photometric means fitted to a given position of the closed loop and operative to effect at least two photometric operations, a transfer means for transferring one sample to the sample holding position without transferring any other sample to the latter, and a discarding means operative to discard the sample only which has been subjected to the given number of photometric operations.
Abstract:
A multi-item automatic chemical analyzer comprising a reagent delivery system for delivering a plurality of reagents of different kinds into reaction vessels in succesion is disclosed. The influence of contamination between the reagents upon measurement is reduced or eliminated by controlling the reagent delivery system with a control system comprising a memory unit for storing information representing a relation of the test items, particularly the influence of contamination between the reagents upon the measurement, and a center process unit for controlling the operation of reagent delivery system in accordance with the stored information.
Abstract:
An automatic analyzing apparatus for automatically effecting chemical analysis on a sample of blood, urea or the like dependent on measurement items by measuring the light absorption degree of a reaction liquid through a reaction vessel, comprising a reaction liquid photometric unit, a photometric unit independent of the reaction light photometric unit and operative to measure beforehand the light absorption degree of the reaction vessel per se or the reaction vessel containing a reagent or dilute liquid, and means for correcting the light absorption degree of the reaction liquid measured at the reaction liquid photometric unit on the basis of the light absorption degree of the reaction vessel per se or the light absorption degree of the reaction vessel containing the reagent or dilute liquid measured at the independent photometric unit.
Abstract:
A method of enhancing the accuracy and reliability of a chemical analysis, wherein a reaction is carried out by combining a sample liquid with at least one reagent to form a test liquid and the test liquid is photometrically scrutinized a plurality of times over an extended period of time to derive a number of photometric values. The derived values are then stored and a plurality of the stored photometric values are preliminarily selected from a given time frame, wherein the plurality of preliminarily selected values are less than a total number of stored photometric values. Successive preliminarily selected photometric values are compared with at least one predetermined standard to derive a comparison result and upon indication that useful data cannot be calculated from the preliminarily selected photometric values, a secondarily selecting step of selecting at least one photometric value from all of the stored photometric values, which were not preliminarily selected, is used to derive an analytical result which represents a concentration of a chemical substance in the test liquid or an activity of the test liquid.
Abstract:
An automatic chemical analyzing apparatus comprising means for feeding successive reaction vessels along a circular reaction line, a sample delivery pump for delivering a given amount of sample liquids to be tested into the reaction vessels, a reagent delivery pump for delivering a given amount of reagent (corresponding to a particular test item to be measured) selected from a plurality of reagents, a first photometering means provided along the circular reaction line for monitoring the reaction condition of a test liquid in the reaction vessel on the reaction line, a second photometering means arranged in a precise photometering section positioned underneath the reaction line, means for transporting the reaction vessel from the reaction line into the precise photometering section after the test liquid in the relevant vessel has been monitored to reach a given reaction condition.