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Method for identifying known materials within a mixture of unknowns

  • US 6,035,246 A
  • Filed: 05/15/1997
  • Issued: 03/07/2000
  • Est. Priority Date: 11/04/1994
  • Status: Expired due to Term
First Claim
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1. A method for identifying the amount of at least one known constituent contained within an unknown mixture comprising:

  • (a) irradiating the purest available sample of at least one known constituent with a reference electromagnetic wave excitation source that sequentially emits a plurality of individual bands of wavelengths of radiation, with the energy from the excitation source interacting with the sample at a first set of wavelengths;

    (b) recording at least one parameter as a measurement of the response of the sample of the at least one known constituent to the excitation source at a second set of wavelengths to form an n-dimensional array consisting of a multiplicity of elements, where n≧

    2;

    (c) creating an optimized patch subset in the array by an evolutionary algorithm, the optimized patch subset containing only those array elements which indicate the presence of the sample of the at least one known constituent;

    (d) irradiating the unknown mixture at the first set of wavelengths;

    (f) recording the at least one parameter as a measurement of the response of the unknown mixture to the excitation source at the second set of wavelengths to form the n-dimensional array of step (b); and

    (g) determining the amount of the at least one known constituent in the unknown mixture by minimizing a function of the residuals between measurements of the at least one parameter associated with the elements in the optimized patch subset for the sample of the at least one known constituent and the measurements of the at least one parameter associated with the elements in a patch subset from the unknown mixture which corresponds with the optimized patch set.

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