METHOD AND DEVICE FOR DETERMINING A SUBSTANCE CONCENTRATION OR A SUBSTANCE IN A LIQUID MEDIUM

    公开(公告)号:US20180266939A1

    公开(公告)日:2018-09-20

    申请号:US15755495

    申请日:2016-07-06

    Inventor: Heinz WAGNER

    Abstract: Method and device for determining at least one substance concentration (c) or at least one substance in a liquid medium, wherein the method consists of the following steps, liquid medium is introduced at a predefined flow speed into a vessel having a known shape, electromagnetic waves having predefined wavelength or having predefined wavelength range are coupled into the liquid medium contained in the vessel, wherein the electromagnetic waves cover a path length in the liquid medium which is dependent on a fill level (xi) of the liquid medium in the vessel, intensities (Φi) of the electromagnetic waves are measured after covering the path length in the liquid medium at at least two predefined points in time (ti) and/or at at least two predefined fill levels (xi) of the vessel, and after a last intensity measurement, the at least one substance concentration (c) or the at least one substance is determined using the measured intensities (Φi) and the at least two predefined points in time (ti) or the at least two predefined fill levels (xi), respectively.

    Method for On-Line Determination of a Basicity Index of a Liquid Body and use of Said Method for a Lubricant

    公开(公告)号:US20180217058A1

    公开(公告)日:2018-08-02

    申请号:US15748370

    申请日:2016-07-26

    Applicant: AVENISENSE

    CPC classification number: G01N21/3577 G01N33/2876 G01N33/2888 G01N2201/129

    Abstract: A method for the on-line determination of a basicity index of a liquid body to be characterized by mid-infrared spectroscopy, the method comprising: (a) detecting an intensity of an infrared signal passing through a sample of the liquid body to be characterized; (b) subsequent to step a, calculating a transmittance value of infrared waves through the sample for p wave numbers, wherein p in a natural integer greater than or equal to two; and (c) determining and expressing the basicity index of the liquid body to be characterized in the form of BN=Tr·M(p×1)+R, wherein BN is the basicity index of the liquid body to be characterized, Tr is a set of transmittance values calculated in step b, M(p×1) is a set of data of a model, the set of data containing coefficients determined from measured basicity index values and measured transmittance values of reference liquid bodies, and R is a residue of the model, determined from the measured basicity index values and the measured transmittance values of the reference liquid bodies.

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