Patent ID: 8722424

Claim:
A method of chromatography quantitative measuring and identifying a used test strip, which applies an optical beam emitted from a light source to a chromatography test strip, the chromatography test strip including an application part to which an inspection target solution is applied, a marker reagent hold part which holds a marker regent capable of being eluted by development of the inspection target solution, a base part in which a specific binding reaction is caused between the marker reagent and an analysis target included in the inspection target solution, and a detection part in which a bounded material of the marker reagent and the analysis target is immobilized, and which quantitatively measures the concentration of the analysis target included in the inspection target solution from an optical signal, said method comprising applying the inspection target solution to the chromatography test strip; applying the optical beam to a predetermined position from the marker reagent hold part to a downstream end of the base part, and detecting a variation of transmitted light or reflected light from the chromatography test strip; automatically measuring the absorbance of the detection part, and measuring the concentration of the analysis target included in the inspection target solution after a predetermined period of time from the detection of variation of the transmitted light or reflected light from the chromatography test strip, which is generated by the elution of the marker reagent that accompanies the development of the inspection target solution; and identifying the chromatography test strip as having been used when the variation of the transmitted light or reflected light from the chromatography test strip, which is generated by the elution of the marker reagent and accompanies the development of the inspection target solution, cannot be detected.