System for matching absorbance spectra employing a library stabilization algorithm

摘要

In a method of matching a known product with one of a library of known products, training sets of the absorbance spectra of the known products are measured and stored. The training sets of the known products are used to determine an expanded standard deviation spectrum for each known product wherein the expanded standard deviation spectrum combines the training set of spectra with shift replicated spectra into expanded training sets of spectra. The absorbance spectrum of the unknown product is measured and the distance of the spectrum of the unknown product from the expanded training sets of spectra is determined by dividing the values of the expanded standard deviation spectra into the difference between the absorbance spectrum of the unknown product and the mean spectrum of the training set.