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Closed Access item Calculation of band boundaries of feasible solutions obtained by Multivariate Curve Resolution–Alternating Least Squares of multiple runs of a reaction monitored by NIR spectroscopy

Authors:Garrido, M.
Larrechi, M. S.
Rius, F. X.
Tauler Ferré, Romà
Keywords:Multivariate Curve Resolution, Alternating Least Squares, Non-linear constrained optimization, Band boundaries, Epoxy resins, Near-infrared
Issue Date:28-Apr-2005
Publisher:Elsevier
Citation:Chemometrics and Intelligent Laboratory Systems 76(2): 111-120 (2005)
Abstract:This study describes a method for calculating the band boundaries of feasible solutions for spectra and concentration profiles obtained by Multivariate Curve Resolution–Alternating Least Squares (MCR–ALS) analysis of a spectroscopic NIR data set. The data set is obtained by monitoring in situ the model reaction between phenyl glycidyl ether (PGE) and aniline. As this system happened to be rank-deficient, the resolution strategy used matrix augmentation. The calculation of band boundaries of feasible solutions is extended here to the simultaneous analysis of multiple data matrices. The boundaries were obtained by a non-linear constrained non-linear optimisation. The influence that the number and type of data matrices in the simultaneous analysis have on the amplitude of band boundaries is also discussed.
Description:10 pages, 7 figures, 1 table.-- Available online Nov 6, 2004.
Publisher version (URL):http://dx.doi.org/10.1016/j.chemolab.2004.10.001
URI:http://hdl.handle.net/10261/15540
ISSN:0169-7439
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