Patent ID: 8858882

Claim:
An auto analyzer comprising: a disk having a plurality of cells formed in the disk, along the circumference thereof, wherein a cell contains a reaction solution in which a sample and a reagent are mixed; a drive unit, constructed to alternate the disk between a rotating state and a stationary state; a control unit, constructed to control the drive unit by use of signals sent to the drive unit; a light measuring unit, including a light source, an analysis unit, a first photoreceiver, and a second photoreceiver; and a data storage unit, constructed to store data from an input unit, data from the first and second photoreceivers, and calibration curve data, wherein a subset of the stored data is used by the control unit for control of the drive unit, and/or used by the analysis unit, and/or outputted to an output unit; wherein the light measuring unit is constructed to irradiate the cell with irradiating light from the light source while the disk is rotating, and to measure light that has interacted with the reaction solution in the cell; wherein the first and second photoreceivers are disposed such that the first photoreceiver is disposed to receive scattered light emanating from the reaction solution, that has a trajectory closer to an optical axis of the irradiating light than light received by the second photoreceiver, wherein the optical axis extends linearly from the light source through the reaction solution; wherein the analysis unit is constructed to measure reaction process data, including changes in the amounts of light received by the first and second photoreceivers, and wherein the analysis unit is constructed to determine an amount of a component in the reaction solution, by using data (y ct ) obtained by subtracting noise (n(t)) from reaction process data of the first photoreceiver (y at ), as follows: y ct =y at −n ( t ); wherein the analysis unit is constructed to estimate the noise (n(t)) by multiplying a sensitivity ratio (α), between the first photoreceiver and the second photoreceiver to a residual error (r b (t)), as follows: n ( t )=α* r b ( t ); and wherein the analysis unit is constructed to estimate the residual error (r b (t)) by calculating a difference between reaction process data of the second photoreceiver (y bt ) and a fitting function (f b (t)) configured to fit reaction process data of the second photoreceiver, as follows: r b ( t )= y bt −f b ( t ).