• Md. Alimur Reza
• Habiba Altaf

Chitin has been extracted from Four different methods. The acquired chitin was transformed into the more beneficial soluble chitosan by way of marinating into solutions of NaOH of a number of concentrations and for prolonged periods of time, then the alkali chitin was heated in an autoclave which dramatically reduced the time of deacetylation. Chitosan’s special tiers of deacetylation can be bought from the deacetylation of chitin in sturdy sodium hydroxide solution at one-of-a-kind durations of time after extraction from crab shells, which waste crab shells in Bangladesh and this is a preliminary find out about to consider a number stages of deacetylated chitin for various functions. The obtained chitosan has been characterized by way of spectral analysis, X-ray diffraction, and thermogravimetric analysis.

Chitin/Chitosan extraction; Food waste; Degree of Deacetylation; Characterization

"Deracination and characterization of chitin and chitosan from waste crab shell", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 6, page no.b575-b584, June-2022, Available :http://www.jetir.org/papers/JETIR2206177.pdf

"Deracination and characterization of chitin and chitosan from waste crab shell", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 6, page no. ppb575-b584, June-2022, Available at : http://www.jetir.org/papers/JETIR2206177.pdf