| 摘要 |
PROBLEM TO BE SOLVED: To provide a means for widening the range of measurable concentration of a specific constituent in a tested solution and capable of simply measuring the accurate concentration of the solution even if there are inhibiting factors such as dirt on a sample cell, suspension in the tested solution, and suspended particles. SOLUTION: The intensity of transmitted light and/or the intensity of scattered light are/is measured of the tested solution before and after a reagent is mixed therein for changing the optical characteristics of the solution owing to a specific constituent, and the concentration of the specific constituent in the solution is found from the measured values. The concentration of protein is found by the above method while the angle of rotation of the solution is measured before the reagent is mixed, thereby determining the concentration of the protein and that of optically active substances other than the protein.
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