Abstract
Near-infrared (NIR) spectroscopy has been a powerful technique for both qualitative and quantitative analysis. Due to the highly overlapping of the spectral bands, however, it is difficult to extract structural and quantitative information from the spectral data. Therefore, chemometric methods have been widely applied to enhance the spectral resolution or extract the spectral information, including modeling techniques, spectral preprocessing, variable selection, outlier detection, modeling transfer, etc. These methods provided colorful approaches for improving the models in both quantitative and discrimination analysis, greatly enhanced the applicability of NIR spectroscopy. On the other hand, temperature-dependent near-infrared spectroscopy was developed for analyzing liquid mixtures or aqueous systems. Chemometric methods were also established to build the quantitative models and extract the temperature-induced spectral variations. The former provided powerful tools for predicting the temperature or the concentration of the components, and the latter provided efficient approaches for understanding the structures and the interactions in chemical and biological samples or processes.
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Acknowledgments
This study was supported by the National Natural Science Foundation of China (No. 22174075), the Natural Science Foundation of Tianjin, China (No. 20JCYBJC01480), the Frontiers Science Center for New Organic Matter, Nankai University (No. 63181206), the Fundamental Research Funds for the Central Universities, Nankai University (No. 63211019) and the Haihe Laboratory of Sustainable Chemical Transformations.
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An, H., Han, L., Sun, Y., Cai, W., Shao, X. (2022). Chemometric Studies in Near-Infrared Spectroscopy. In: Chu, X., Guo, L., Huang, Y., Yuan, H. (eds) Sense the Real Change: Proceedings of the 20th International Conference on Near Infrared Spectroscopy. ICNIR 2021. Springer, Singapore. https://doi.org/10.1007/978-981-19-4884-8_4
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