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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Debranched cassava starch crystallinity determination by Raman spectroscopy: Correlation of features in Raman spectra with X-ray diffraction and
13
C CP/MAS NMR spectroscopy
Carbohydrate Polymers, Volume 87, No. 1, Year 2012
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Description
Because starch crystallinity influences the physical, mechanical, and technological aspects of numerous starch-based products during production and storage, rapid techniques for its assessment are vital. Samples of different levels of crystallinity were obtained by debranching gelatinized cassava starch, followed by subjection to various hydrothermal treatments. The recrystallized products were further subjected to partial hydrolysis with a mixture of α-amylase and glucoamylase prior to freeze-drying. Crystallinities were determined using X-ray diffraction (XRD) and 13C CP/MAS NMR spectroscopy, and correlated with FT-Raman spectra features. XRD crystallinities ranged between 0 and 58%, and agreed with crystalline-phase fractions (R 2 = 0.99) derived from the respective 13C CP/MAS NMR spectra. A strong linear correlation was found between crystallinities and integrated areas of the skeletal mode Raman band at 480 cm-1 (R 2 = 0.99). With appropriate calibration, FT-Raman spectroscopy is a promising tool for rapid determination of starch crystallinity. © 2011 Elsevier Ltd. All Rights Reserved.
Authors & Co-Authors
Mutungi, Christopher M.
Germany, Dresden
Technische Universität Dresden
Passauer, Lars
Germany, Dresden
Technische Universität Dresden
Onyango, Calvin
Kenya, Nairobi
Kenya Industrial Research and Development Institute
Jaros, Doris
Germany, Dresden
Technische Universität Dresden
Rohm, Harald
Germany, Dresden
Technische Universität Dresden
Statistics
Citations: 172
Authors: 5
Affiliations: 2
Identifiers
Doi:
10.1016/j.carbpol.2011.08.032
ISSN:
01448617