Abstract
A factor analysis of a set of spectra of multicomponent mixtures yields <i>n</i> orthogonal spectra where <i>n</i> is the number of components in the mixtures. Combinations of these orthogonal spectra, done so as to eliminate the contributions to the spectra from one of the components, yield a set of <i>n</i> – 1 linearly independent abstract spectra. Repetition of this process is used to estimate the spectrum of each of the components without identifying the range of the <i>n</i>-dimensional vector space in which the solution must fall. Several techniques for estimating the appropriate combinations of orthogonal spectra are compared.
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