| 摘要 |
[Problem] To construct an accurate and simple inline concentration measurement probe that has a reduced optical path length, minimizes the liquid flow inhibition in a measurement part, and is not subject to light leakage, or the like. [Solution] In a probe 5, 5ʹ for guiding light having passed through a reaction solution to a light reception element via an optical fiber 1, the core diameter of the fiber 1 for guiding transmitted light to the light reception element is wider than the core diameter of the fiber 1 for guiding light emitted from the light source 10, the fiber 1 leading ends are fixed so as to protrude so that the exposed core surfaces of the end of the fiber 1 for guiding the light from the light source opposite from the light source and the end of the fiber for guiding the transmitted light to the light reception element opposite from the light reception element oppose each other, and the distance 6 between the opposing exposed cores is at most the value arrived at by dividing the optical path length when the reaction solution concentration is measured offline by an offline measurement dilution rate. |
