期刊
ANALYTICA CHIMICA ACTA
卷 869, 期 -, 页码 59-67出版社
ELSEVIER
DOI: 10.1016/j.aca.2015.02.037
关键词
Rare Earth elements; Ultraviolet-visible (UV-vis); spectrophotometry; Partial least squares (PLS); Multivariate curve resolution-alternating least squares (MCR-ALS); Out-of control behavior
Noninvasive analytical control is of special interest for the complicated and hazardous production processes. On-line monitoring provides a unique opportunity to determine critical concentrations rapidly and without serious risks to operating personnel and the environment. Models for quantitative determination of concentrations of Rare Earth Elements in complex mixtures in nitric acid serve for these purposes. Here, the feasibility of simultaneous determination of cerium, praseodymium, and neodymium using the whole UV-vis spectroscopic range, together with chemometric data processing, is studied. The predictability of two chemometric techniques, partial least squares regression and correlation constrained multivariate curve resolution-alternating least squares are compared. Models' performances are analyzed in out-of-control cases. (C) 2015 Elsevier B.V. All rights reserved.
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