SAMPLE SOLUTION CONCENTRATION DETERMINATION METHOD AND SAMPLE SOLUTION CONCENTRATION DETERMINATION DEVICE

摘要

Provided is a method for determining the concentration of a sample solution with which the concentration of a sample solution is quantitatively determined by measuring the chemiluminescent intensity generated inside a reactor (2), which is characterized in that the reactor (2) is an in-series connection of two or more reaction cells having spray holes and emission holes; the cross-sectional area ratio (S1/S2) of the cross-sectional area (S1) of each reaction cell and the cross-sectional area (S2) of each spray hole is 3 or greater; the sample solution and reactant solution are introduced from a spray hole (9) in a first reaction cell (A), turbulent flow is generated by the jet from the introduced solution and the sample solution and reactant solution are mixed; in the second and subsequent reaction cells, the resulting first mixture is similarly introduced, turbulent flow is generated by the jet, and further mixing occurs; and the chemiluminescent intensity generated inside reactor (2) is measured. A determination method is thereby provided with which the chemiluminescent intensity generated by mixing a sample solution and a reactant solution can be determined with good reproducibility and the concentration of the sample solution can be quantitatively determined with good precision.