Patent ID: 8305564

Claim:
A method for automatically discriminating a control solution from a liquid to be detected in a measurement system for measuring a target ingredient in the liquid to be detected, the method comprising: measuring luminance of a liquid to be detected at a detection wavelength when a response value is absorbance; determining whether or not a response value of the liquid to be detected at the detection wavelength is equal to or higher than a predetermined upper limit value; measuring the luminance of the liquid to be detected at the detection wavelength when it is determined that the response value of the liquid to be detected at the detection wavelength is equal to or higher than the predetermined upper limit value; determining whether or not the response value of the liquid to be detected at a reference wavelength is lower than a predetermined lower limit value; and discriminating the liquid as a control solution when it is determined that the response value at the reference wavelength of the liquid to be detected is lower than the predetermined lower limit value, wherein the predetermined upper limit value has been determined by measuring plural biological samples at the detection wavelength and taking a highest value of the measured values as the upper limit value, and the predetermined lower limit value has been determined by measuring the plural biological samples at the reference wavelength and taking a lowest value of the measured values as the lower limit value.