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An infrared investigation in relation with chitin and chitosan characterization

Abstract : The use of infrared spectroscopy for characterization of the composition of chitin and chitosan covering the entire range of degree of acetylation (DA) and a wide variety of raw materials is examined further. The ratio of absorbance bands selected was calibrated using 1H liquid and 13C CP-MAS solid-state NMR as absolute techniques. IR spectra of the structural units of these polymers validated the choice of baselines and characteristic bands. The bands at 1650 and 1320 cm-1 were chosen to measure the DA. As internal reference, the intensities at 3450 and 1420 cm-1 were evaluated. The absorption band ratios involving the reference at 3450 cm-1 had poorer fit.. The absorption ratio A1320/A1420 shows superior agreement between the absolute and estimated DA-values (DA% = 31.92A1320/A1420 - 12.20; r = 0.990). © 2001 Elsevier Science Ltd.
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https://hal.archives-ouvertes.fr/hal-01585443
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Submitted on : Monday, September 11, 2017 - 3:28:01 PM
Last modification on : Friday, November 6, 2020 - 3:58:45 AM

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J. Brugnerotto, J. Lizardi, F.M. Goycoolea, W. Argüelles-Monal, J. Desbrieres, et al.. An infrared investigation in relation with chitin and chitosan characterization. Polymer, Elsevier, 2001, 42 (8), pp.3569-3580. ⟨10.1016/S0032-3861(00)00713-8⟩. ⟨hal-01585443⟩

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