Abstract
Near-infrared spectroscopy (NIRS) has been applied for decades to the analysis of agrifood products, and in recent years its use has been extended to the determination of mineral species and trace elements in organic and inorganic matrices. The near-infrared region (NIR) spectrum contains physical and chemical information of the product being analyzed. The spectral information has its origin in the different vibrational modes of the molecules caused by their interaction with the electromagnetic radiation absorbed at wavelengths between 750 and 2500 nm. The use of chemometrics allows the relevant information contained in the NIR spectra to be extracted to develop calibration models that permit the prediction of the composition of unknown samples. The technique is rapid and, in contrast to the standard techniques of analysis, can be performed at a low analytical cost and without using chemicals. In addition, those error sources related with laboratory analysis are avoided. The control of those sources of error specific to the NIR analysis leads to equations of high accuracy and precision. The application of NIRS to the determination of arsenic, lead, copper, and zinc in wild and cultivated plant species has revealed its potential in the screening of these elements for phytoremediation purposes.
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Font, R., del Río-Celestino, M., de Haro-Bailón, A. (2007). Near-Infrared Reflectance Spectroscopy. In: Willey, N. (eds) Phytoremediation. Methods in Biotechnology, vol 23. Humana Press. https://doi.org/10.1007/978-1-59745-098-0_17
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DOI: https://doi.org/10.1007/978-1-59745-098-0_17
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