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Microwave-Assisted Isolation and Acetylation of Inulin from Helianthus Tuberosus L Tubers

Nadezhda Petkova1,*, Gergana Gencheva1, Dragomir Vassilev2, Milena Koleva2, Albert Krastanov3, Panteley Denev1

Department of Organic Chemistry and Inorganic Chemistry, University of Food Technologies, 26 Maritza Blvd., Plovdiv, 4002, Bulgaria
Department Physics, Chemistry and Ecology, Technical University of Gabrovo, Gabrovo, 5300, Bulgaria
Department of Biotechnology, University of Food Technologies, 26 Maritza Blvd., Plovdiv, 4002, Bulgaria

*Corresponding author: email

Journal of Renewable Materials 2018, 6(7), 671-679. https://doi.org/10.32604/JRM.2018.00001

Abstract

Jerusalem artichoke (Helianthus tuberosus L.) tubers are industrial crop considered as a promising source for inulin production. “Green” method was performed for accelerated inulin extraction from Helianthus tuberosus L. tubers by the application of microwave irradiation. Further pretreatment of the water extract with acetone and ethanol yielded inulin (20%) with purity 89% and degree of polymerization 18. Jerusalem artichoke inulin was characterized by FTIR and NMR spectroscopy. For the first time eco-friendly synthesis of acetylated Jerusalem artichoke inulin was performed by the reaction with acetic anhydride, without toxic solvent, but only with sodium acetate as catalyst under microwave irradiation for 60 s. The degree of acetylation (DA=2.1) and the structure of inulin esters were confirmed by 1H and 13C NMR. The suggested microwave acetylation shortens significantly the esterification reaction.

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APA Style
Petkova, N., Gencheva, G., Vassilev, D., Koleva, M., Krastanov, A. et al. (2018). Microwave-assisted isolation and acetylation of inulin from helianthus tuberosus L tubers. Journal of Renewable Materials, 6(7), 671-679. https://doi.org/10.32604/JRM.2018.00001
Vancouver Style
Petkova N, Gencheva G, Vassilev D, Koleva M, Krastanov A, Denev P. Microwave-assisted isolation and acetylation of inulin from helianthus tuberosus L tubers. J Renew Mater. 2018;6(7):671-679 https://doi.org/10.32604/JRM.2018.00001
IEEE Style
N. Petkova, G. Gencheva, D. Vassilev, M. Koleva, A. Krastanov, and P. Denev "Microwave-Assisted Isolation and Acetylation of Inulin from Helianthus Tuberosus L Tubers," J. Renew. Mater., vol. 6, no. 7, pp. 671-679. 2018. https://doi.org/10.32604/JRM.2018.00001

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