| 摘要 |
Provided is an oil concentration measurement system and method which can measure the concentration of oil over a wide concentration range and is therefore applicable in a continuous measurement of the oil concentration. For a measurement-target liquid containing a known kind of oil component, an absorbance spectrum is measured within a predetermined waveband where an absorption of light is observed (S2; S3). If a predetermined criterion is met, a concentration value of the oil component is determined based on an absorbance at a predetermined wavelength within the predetermined waveband as well as based on a first calibration curve showing the relationship between the concentration of the component and the absorbance at the predetermined wavelength (S4; S51). If the predetermined criterion is not met, a concentration value is determined based on the wavelength at which the absorbance has a predetermined absorbance value within the absorbance spectrum as well as based on a second calibration curve showing the relationship between the concentration of the component and the wavelength at which the absorbance has the predetermined absorbance value (S4; S52). |
