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Updated: Dec 20, 2025

O-cresol Concentration Online Measurement Based On Near Infrared Spectroscopy Via Partial Least Square Regression
Published on: November 8, 2019
Simultaneous measurement of phenols by three-way fluorescence spectroscopy: A comparison of N-PLS/RBL, U-PLS/RBL and
Wei Zhu1, Nan Jing Zhao2, Rui Fang Yang2
1Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, China; University of Science and Technology of China, Hefei, 230026, China.
Abstract:
Phenol, o-cresol, p-cresol, catechol and resorcinol are five phenolic compounds with extremely similar structure. Their fluorescence spectra are hard to be analyzed because of the serious spectral overlaps between any two of the five phenolic components in the mixture system. In this experiment, multi-dimensional partial least-squares (N-PLS), unfolded partial least-squares (U-PLS) with residual bilinearization (RBL) and parallel factor analysis (PARAFAC) are employed to analyze the three-way fluorescence spectra aiming to achieve quantitative results. Meanwhile, a contrast of these three methods is given. The experiment results show that N-PLS/RBL and U-PLS/RBL algorithms are superior to PARARFAC in terms of analysis of highly overlapping three-way fluorescence spectra for concentration determination.
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