Patent ID: 8474303

Claim:
A chromatographic measurement apparatus for measuring a color development state of a testing area of an insoluble carrier having a label substance immobilized thereon to test a test article, the testing area including a test detection area where a material that binds specifically to the test article is immobilized and a control detection area used for determining an end of measurement, a sample solution containing the test article and the label substance for labeling the test article being developed on the insoluble carrier, the chromatographic measurement apparatus comprising: measuring means for measuring optical density and chromaticity as the color development state; determining means for carrying out determination of validity and determination of necessity of amplification of a test result of the test article based on the optical density and the chromaticity measured by the measuring means; and amplifying means for developing an amplifying solution for amplifying the color development state when it is determined in the determination of necessity of amplification that amplification is necessary, wherein the determining means determines in the determination of necessity of amplification that amplification is necessary if the optical density and the chromaticity of the test detection area or the control detection area have not reached a predetermined value, and the color development state amplified by the amplifying means is measured to test the test article.