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    VERFAHREN UND VORRICHTUNG ZUR MESSUNG DER OPTISCHEN ABSORPTION VON PROBEN
    147.
    发明公开
    VERFAHREN UND VORRICHTUNG ZUR MESSUNG DER OPTISCHEN ABSORPTION VON PROBEN 有权
    方法和装置测量样品的光吸收

    公开(公告)号：EP2005142A1

    公开(公告)日：2008-12-24

    申请号：EP07727944.6

    申请日：2007-04-10

    Applicant: Emerson Process Management GmbH & Co. OHG

    Inventor： RANDOW, Albert ,  DANDL, Helmut ,  KRAUSE, Hans

    IPC: G01N21/27 ,  G01J3/42

    CPC classification number: G01N21/274 ,  G01J3/02 ,  G01J3/0232 ,  G01J3/42 ,  G01J2001/4242 ,  G01N21/3518

    Abstract: In the case of a method and an apparatus for measuring the optical absorption of samples with a light source (1), a photoelectric transducer (8), a measurement beam path which runs between the light source (1) and the transducer (8) and in which the sample to be examined is arranged, a reference beam path which runs between the light source (1) and the transducer (8) and in which a reference sample is arranged, and a motor-driven chopper disc (10), the chopper disc (10) is formed with a first number of first openings (15) which enable only the measurement beam path and a second number of second openings (16) which enable only the reference beam path. A lock-in amplifier (21) and a device (17) for synchronizing the lock-in amplifier (21) with the chopper disc (10) are connected to the transducer (8) and an evaluation circuit (26) forms the quotient of the transmitted intensity of the reference beam path, which is detected by the transducer (8), and the transmitted intensity of the measurement beam path, which is detected by the transducer (8), as a measure of the concentration of the sample in such a manner that the reduction in the radiation intensity as a result of absorption leads to an increase in the sensitivity.

    VERFAHREN ZUR BESTIMMUNG DER IDENTITÄT ODER NICHT-IDENTITÄT UND KONZENTRATION EINER CHEMISCHEN VERBINDUNG IN EINEM MEDIUM
    150.
    发明公开
    VERFAHREN ZUR BESTIMMUNG DER IDENTITÄT ODER NICHT-IDENTITÄT UND KONZENTRATION EINER CHEMISCHEN VERBINDUNG IN EINEM MEDIUM 审中-公开
    方法确定身份或NON-身份和浓度的化合物在介质中

    公开(公告)号：EP1969324A1

    公开(公告)日：2008-09-17

    申请号：EP06841630.4

    申请日：2006-12-27

    Applicant: BASF SE

    Inventor： SENS, Rüdiger ,  VAMVAKARIS, Christos ,  AHLERS, Wolfgang ,  THIEL, Erwin

    IPC: G01J3/28 ,  G01N21/31 ,  G01N21/64

    CPC classification number: G01J3/4406 ,  G01J3/02 ,  G01J3/0232 ,  G01J3/457 ,  G01J2001/4242 ,  G01N21/31 ,  G01N21/643 ,  G01N21/645 ,  G01N2021/6491 ,  G01N2201/129

    Abstract: The invention relates to a method for detecting at least one chemical compound V that is contained in a medium (312). Said method has a verification step (420), in which the presence of the compound V in the medium (312) is determined. In addition, the method has an analysis step (424), in which a concentration c of the chemical compound or compounds V is determined. The verification step comprises the following sub-steps: (a1) the medium (312) is irradiated with first analysis radiation (316) of a variable wavelength λ, said wavelength λ having at least two different values; (a2) a spectral response function A(λ) is generated using the radiation (324) that has been absorbed and/or emitted and/or reflected and/or scattered by the medium (312), in response to the first analysis radiation (316); (a3) at least one spectral correlation function K(δλ) is formed by comparing the spectral response function(s) A(λ) with at least one model function R(λ + δλ), in which said model function(s) R(λ) represent(s) a spectral measured function of a medium (312) that contains the chemical compound V and δλ is a co-ordinate shift; (a4) the spectral correlation function(s) K(δλ) is examined in a model identification step (418) and conclusions are drawn as to whether the chemical compound(s) V is or are contained in the medium (312). The analysis step (424) has the following sub-steps: (b1) the medium (312) is irradiated with at least second analysis radiation (318) that has at least one excitation wavelength λEX; (b2) at least one spectral analysis function B(λEX, λRES) is generated using the radiation (326) of the response wavelength λRES that has been absorbed and/or emitted and/or reflected and/or scattered by the medium (312), in response to the second analysis radiation (318) of wavelength λEX and conclusions concerning the concentration c are drawn.

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