Infrared spectroscopy of extracted and acetylated chitin in versatile deep eutectic solvents (DES)

The conventional method to extract the chitin content from the crustacean shells usually uses concentrated acids and alkalis to remove impurities such as calcium carbonate and protein. However, the uses of concentrated acids and alkalis have caused many environmental issues. Deep Eutectic Solvent (D...

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Bibliographic Details
Main Authors: Daud, Suhardy, Musa, Luqman, Kasim, Farizul Hafiz, Salleh, Mohd Nazry, Mustafa, Nazahah, Ahmad, Zuliahani
Format: Conference Proceeding
Language:English
Subjects:
Acetylation
Alkalies
Alkalizing
Calcium carbonate
Chitin
Chlorides
Choline
Crustaceans
Hydrogen bonds
Infrared analysis
Infrared spectroscopy
Solvents
Spectrum analysis
Ureas
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Summary:The conventional method to extract the chitin content from the crustacean shells usually uses concentrated acids and alkalis to remove impurities such as calcium carbonate and protein. However, the uses of concentrated acids and alkalis have caused many environmental issues. Deep Eutectic Solvent (DES) is one of the solvents that can be used to extract the chitin content from the crustacean shells. DES has two components namely Hydrogen Bond Donor (HBD) and Hydrogen Bond Acceptor (HBA). In this study, two types of DES have been used are betaine (HBA) - urea (HBD) and choline chloride (HBA) - urea (HBD). The results showed that DES betaine - urea and choline chloride - urea have extracted chitin content of 5.4609 % and 2.0020 % w/w respectively. The extracted chitins were analyzed using infrared spectroscopy method. The values of the degree of acetylation (DA) for the chitins were 103.1699 and 83.4821 respectively.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0090914