Abstract: An automatic analyzer is capable of performing analysis of a precision control sample in response to an external factor to alleviate the burden on the operator and surely performing precision control at appropriate timing at which precision control must be performed, thereby allowing automatic maintenance of the measurement precision. Analysis of a precision control sample is performed by creating an analysis request for the internally held precision control sample and then transferring the precision control sample in response to an external factor occurring, for example, when a calibrator is inputted in the analyzer, the number of remaining reagents under analysis satisfies a predetermined condition (becomes zero or falls below a specified value), the date changes, a specified time runs out, the operator is changed, the number of analyzed samples exceeds a specified value, a specified time period has elapsed, a new reagent is registered, a measurement failure is detected, etc.

Abstract: A set standard sample is identified, and a quality control material relevant to a reagent requested by the standard sample and stored in a buffer is fed automatically to an analyzer module. The measurement of the quality control material is performed immediately after the measurement of the standard sample for the reagent. A warning signal is generated to prompt the operator to replenish the quality control material when it is decided from the amount of the residual quality control material stored in the buffer that the quality control material is insufficient.