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Table 3 Methods of conversion of chitin to chitosan

From: Seafood waste: a source for preparation of commercially employable chitin/chitosan materials

S. no Method Type of conditions Deacetylation degree (%) References
1. Chemical 12.5 M NaOH (140 °C for 4 h)   Hajji et al. (2014)
2. Chemical Soaking in 18 M NaOH (24 h), Heating (90 °C for 7 h) 94.9 Ma et al. (2015)
3. Chemical and microwave irradiation 50% NaOH, 8 min irradiation at 350 W 82.7 Knidri et al. (2016)
4. Ultrasound-assisted chemical method 40% NaOH, alternate irradiation (45 min) and non-irradiation (30 min) periods 77.9 Birolli et al. (2016)
5. Ultrasound-assisted chemical method Ultrasound-assisted deacetylation chitin in 40% NaOH (50 min, 60 °C) 95 Fiamingo et al. (2016)
6. Chemical Soaking chitin in 50% NaOH and autoclaved 88 Sedaghat et al. (2017)
7. Chemical 50% NaOH (90 °C, 30 h) 74 Yong et al. (2018)
  1. The physiochemical properties of chitin and chitosan have been summarized in Table 4