Abstract:
Chitosan was prepared from mantis shrimp carapace species of harpiosquilla harpax
by deacetylation process performed in 40% and 50% NaOH and both samples were
maintained at 90 °C and for 5 hours. Chitosan obtained were analyzed for
physicochemical properties to observe the effects of deacetylation using different
concentration of sodium hydroxide (NaOH). Chitosan extracted from deacetylation
by 50% NaOH (C50) showed higher degree of deacetylation than that of chitosan
extracted from deacetylation by 40% NaOH (C40) which is 72.91 % while the other
one is 70.60%. The yield of chitosan extracted (CSO and C40) is (51.46% and 45.0%)
due more to the source of chitin and not to the effectiveness of degree of
deacetylation. The moisture content for C40 and C50 is 12.607% and 14.24%, for ash
content analysis,the C40 showed 0.3316% while the ash content obtained from C50 is
0.3179%. The other physicochemical analysis are; water binding capacity (C40754.0%
and
CS0-718.7%),
fat
binding capacity (C40-344.29%) and (CS0-381.39%),
apparent viscosity; (C40-1403.3 cP) and (CS0-2023.3 cP). The colour of chitosan
extracted is in yellowish-white, small crisp and glitter flakes form. The different
concentration of NaOH affects the physicochemical properties of chitosan extracted
by affecting the degree of deacetylation.
