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Title:
OIL CONCENTRATION MEASURING DEVICE AND OIL CONCENTRATION MEASURING METHOD
Document Type and Number:
WIPO Patent Application WO/2018/025813
Kind Code:
A1
Abstract:
Provided is an oil concentration measuring device for measuring the concentration of oil in a cleaning liquid, with which it is not necessary to use a costly spectroscopic element or detecting element, for example. An oil concentration measuring device 10 is provided with: a light radiating unit 104 which radiates radiating light having a measuring wavelength, which is one prescribed wavelength between 280 and 300 nm, onto a liquid to be measured (cleaning liquid); a transmitted light detecting unit 105 which measures the intensity of transmitted light resulting from the radiating light that has been transmitted through the liquid to be measured; and an oil concentration determining unit 1061 which calculates a light absorbency, at the measuring wavelength, of the liquid to be measured, on the basis of the intensity of the transmitted light measured by the transmitted light detecting unit 105, and obtains the concentration of oil in the liquid to be measured, on the basis of the value of the light absorbency, and a calibration curve indicating a relationship between the concentration of the oil and the light absorbency at the measuring wavelength. By using one wavelength between 280 and 300 nm at which molecules that do not have multiple carbon element bonds, included in hydrocarbon based cleaning liquids, which are mainstream industrial cleaning liquids, absorb almost no light, and with which it is possible to detect oil with a low concentration of approximately 50 ppm, a costly spectroscopic element or detecting element, for example, becomes unnecessary.

Inventors:
OGASAWARA, Kazuhisa (40, Ippongi Yoko-oji, Fushimi-ku, Kyoto-sh, Kyoto 52, 〒6128252, JP)
Application Number:
JP2017/027732
Publication Date:
February 08, 2018
Filing Date:
July 31, 2017
Export Citation:
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Assignee:
ACT FIVE CO., LTD. (40 Ippongi Yoko-oji, Fushimi-ku Kyoto-sh, Kyoto 52, 〒6128252, JP)
International Classes:
G01N21/33; B08B3/12
Attorney, Agent or Firm:
KYOTO INTERNATIONAL PATENT LAW OFFICE (Hougen-Sizyokarasuma Building, 37 Motoakuozi-tyo, Higasinotouin Sizyo-sagaru, Simogyo-ku, Kyoto-s, Kyoto 91, 〒6008091, JP)
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