| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil content measuring apparatus capable of highly precisely measuring an oil content remaining in treated water in a water treatment site.SOLUTION: A treated water oil content measuring apparatus comprises: a fluid device 101 extracting an oil content to a solvent by mixing treated water containing the oil content with the solvent; a dispensation nozzle 108 connected to the fluid device 101 and supplying a predetermined minute amount of the solvent after extraction of the oil content onto a crystal oscillator 103; a sensor circuit 104 measuring a resonant frequency of the crystal oscillator 103 at predetermined intervals; and a controller 105 controlling the fluid device 101 and the sensor circuit 104. The apparatus comprises an arithmetic unit receiving, from the sensor circuit 104, the resonant frequency of the crystal oscillator 103 onto which the minute amount of the solvent after extraction of a predetermined amount of the oil content is supplied from the dispensation nozzle 108, and measuring the oil content remaining on the crystal oscillator 103 after evaporation of the solvent on the basis of a fluctuation in the resonant frequency. |
