Differential spectral topographic analysis (DISTA)

Details Differential spectral topographic analysis (DISTA) Differential spectral topographic analysis (DISTA)

1997-11-04

2000-07-04

Hoff, Marc S.

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Chemical analysis

702 27, 702 30, 356326, 356327, G06F 1900

Patent

active

060851538

ABSTRACT:
The present invention provides a new analysis based on Differential Spectral Topographic Analysis (DISTA). Using data from the spectral methods known in the art, DISTA is based upon the normalization of the spectra to a fixed topographic space, creating a set of spectral forms, and the summation of the absolute differences in topography between one or more reference spectra and the test spectra taken at different magnitudes of the perturbing parameter. This method allows for a sensitive estimate of the fraction of form A and form B of an entity of interest. This method also allows for the calculation of apparent free energy from the conversion of the entity of interest from a first to a second form where appropriate, and in the alternative, calculation of a fraction of structural changes.

REFERENCES:
patent: 4267572 (1981-05-01), Witte
patent: 4642778 (1987-02-01), Hieftje et al.
patent: 4885697 (1989-12-01), Hubner
patent: 5446681 (1995-08-01), Gethner et al.
patent: 5481476 (1996-01-01), Windig
patent: 5612783 (1997-03-01), Hirsh

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