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Method for Determining the Identity, Absence and Concentration of a Chemical Compound in a Medium

  • US 20090006004A1
  • Filed: 12/27/2006
  • Published: 01/01/2009
  • Est. Priority Date: 12/29/2005
  • Status: Abandoned Application
First Claim
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1. :

  • A method for detecting at least one chemical compound V comprised in a medium, comprising a verification step which is used to determine whether V is comprised in the medium, and furthermore comprising an analysis step in which a concentration c of the at least one chemical compound V is determined,the verification step comprising the following substeps;

    (a1) the medium is exposed to a first analysis radiation of a variable wavelength λ

    , the wavelength λ

    assuming at least two different values;

    (a2) at least one spectral response function A(λ

    ) is generated with the aid of the radiation absorbed and/or emitted and/or reflected and/or scattered by the medium in response to the first analysis radiation;

    (a3) at least one spectral correlation function K(δ

    λ

    ) is formed by spectral comparison of the at least one spectral response function A(λ

    ) with at least one pattern function R(λ



    λ

    ), the at least one pattern function R(λ

    ) representing a spectral measurement function of a medium comprising the chemical compound V and δ

    λ

    , being a coordinate shift;

    (a4) the at least one spectral correlation function K(δ

    λ

    ) is examined in a pattern recognition step, and a conclusion is made as to whether the at least one chemical compound V is comprised in the medium;

    the analysis step comprising the following substeps;

    (b1) the medium is exposed to at least one second analysis radiation having at least one excitation wavelength λ

    EX;

    (b2) at least one spectral analysis function B(λ

    EX, λ

    RES) is generated with the aid of the radiation of the response wavelength λ

    RES absorbed and/or emitted and/or reflected and/or scattered by the medium in response to the second analysis radiation of the wavelength λ

    RES and the concentration c is deduced therefrom,wherein the verification step and the analysis step are carried out separately and in that the analysis step is carried out only if the verification step has established that the compound V is comprised in the medium.

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