An infrared investigation in relation with chitin and chitosan characterization

By J. Brugnerotto, Jaime Lizardi‐Mendoza, F. Goycoolea, W. Argüelles-Monal, J. Desbrières, M. Rinaudo. 2001

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Removal of various pollutants from water and wastewater by modified chitosan adsorbents (2017, methodology): “DD depends on the raw material source and the preparation procedure and can be calculated by different methods, such as NMR and infra-red spectroscopy analysis (Brugnerotto et al., 2001; Rinaudo et al., 1992).”
Chitin and chitosan: Properties and applications (2006, background): “This hypothesis is reinforced by the presence of only one band in this region for Nacetyl D-glucosamine [37,42].”
Dissolution Behavior of Chitin in Ionic Liquids (2010, methodology): “The DA of the samples with high DA were determined by Fourier transform infrared (FTIR), using a method proposed by Brugnerotto et al.[41] The 1320 cm−1 band was used as the analytical band and the 1420 cm−1 band as the internal reference band.”
Chitin and Chitosan Preparation from Marine Sources. Structure, Properties and Applications (2015, methodology): “This problem was also discussed previously for samples with different DAs [86].”
Application of Spectroscopic Methods for Structural Analysis of Chitin and Chitosan (2010, methodology): “The different baselines suggested in the literature [129] are presented in Figure 8.”