| 摘要 |
After dropping a sample onto an immunochromatographic test strip 41, a change of absorbance at a first position (band-like region 41c) on the immunochromatographic test strip 41 is sensed by detecting reflected light while illuminating a measurement light on the first position, a change of absorbance at a second position (band-like region 41d) at a downstream side of the first position on the immunochromatographic test strip 41 is sensed by detecting reflected light while illuminating measurement light on the second position, and a coloration degree is corrected based on an elapsed time from the change of absorbance at the first position to the change of absorbance at the second position.
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