| 摘要 |
PROBLEM TO BE SOLVED: To provide an immunoassay and a measuring reagent solving the lack of sensitivity due to incapability of acquiring a calibration curve of good linearity or acquiring the calibration curve of small inclination on the whole since the configuration of the calibration curve becomes sigmoid-like in the immunoassay by nephelometry or turbidimetry and further solving the frequent occurrence of dispersion or the like of the measured value caused by the lot difference of the reagent used for immunoassay. SOLUTION: Immunoglobulin constituting a polymer such as an IgM type antibody is included in an antibody used for measurement. As a result, there is no influence on a measuring range by the quantity of a specimen, nor does the calibration curve become sigmoid-like. The measuring method and the measuring reagent with good linearity, large inclination and high sensitivity can thereby be provided.
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