Patent ID: 6539285
Filing Date: 2003-03-25
Classification: B01J,G01J,G01N

Abstract:
A method for determining the spectrum of a chemical composition in a method for the process control of chemical processes using Fourier transform (FT) infrared (IR) spectroscopy, the method comprising the steps of:a) feeding a composition into a storage vessel; b) stirring said composition; c) passing a beam of IR radiation through said composition; d) generating an interferogram following step c); e) analyzing regions of said interferogram outside a central burst region for unwanted intensity fluctuations; f) labeling, following step e), said interferogram as at least one of acceptable and non-acceptable; g) repeating steps e)-f) a plurality of times; h) adding together acceptable interferograms or segments of interferograms to generate a sum interferogram; and i) Fourier transforming said sum interferogram to obtain a spectrum of said composition.