Comparison Biological Properties of Chitosan, Extracted from Whiteleg Shrimp (Litopenaeus vannami), Indian Squid (Uroteuthis duvaucelii) And Blue crab (Portunus pelagicus)

In this research, chitin and chitosan were extracted from the wastes of this aquatic Species, in three different ways, and then some of their biological properties were investigated. Acidic extraction of chitosan was obtained from shrimp shells 0.2 g and crab shells 0.15 g per 5 g dry shell. In the special extraction for crab, the highest amount of chitosan from crab was 0.4 g and in the next ranking shrimp with 0.3 g. Only in the extraction of Squid, which received 0.3 grams of chitosan per 5 grams of squid dried dry internal cattle. The average molecular weight of chitosan was determined by measuring the intrinsic viscosity, which is the highest molecular weight associated with shrimp shell with 18039 gr / mol and the lowest is related to 1668 gr / mol from squid. The highest water solubility was found in the chitosan produced from the Indian Squid shell of 92.81%. The study of the FT-IR spectrum showed that the highest percentage of deacetylation was related to squid with 92.39%. SEM evaluation was also conducted to study the molecular structure of extracted chitosan from three different sources with three different accuracy.