EGG PRESERVING AGENT USING THE CHITOSAN AND PRODUCING METHOD THEREOF

摘要

A method of manufacturing an egg preservative by decalcifying a crustacean's shell with HCl, deproteinizing with NaOH, depigmenting with NaOCl and deacetylating with NaOH is provided. The method simplifies manufacturing process. The chitosan solution obtained is diluted with acetic acid solutions and coated on eggs. A crustacean's shell as a raw material is mixed with HCl in a ratio of 1:15(w/v), reacted for 30min, added with the weight of 3% NaOH solution ten times as much as the raw material and reacted for 5min. The deproteinized raw material is reacted with the weight of 10% NaOCl solution ten times as much as deproteinized raw material for 5min, added 45% NaOH and deacetylated ten times as much as the decolored material for 30min to obtain chitosan. The chitosan obtained is diluted with 1% acetic acid solutions.