| 摘要 |
The present invention relates to a method and an apparatus for optically measuring the concentration of material characterized in that the concentration of a specific material in a liquid or a gas is detected optically by utilizing extinction of a light emitting member by the specific material or a material derived therefrom, wherein a second light emitting member (B) which is not substantially extinguished by the specific material or a material derived therefrom is added to a measuring system together with a first light emitting member (A) which is extinguished by the specific material or the material derived therefrom, an optical signal corresponding to the intensity (IA) of emission from the first light emitting member (A) and an optical signal corresponding to the intensity (IB) of emission from the second light emitting member (B) are measured and variable factors involved with light emission intensity are reduced by calculating the ratio between these optical signals. Thus, the present invention enables the concentration of the specific material to be detected with a high level of accuracy. |
