Studies on Extraction Technique of Chitin from the Pupa of Dictyoploca Japonica and Quality Test of Product
In order to produce high-quality chitin, the extraction of chitin from pupa of Dictyoploca japonica was studied by acid-alkali method. The extraction technique of chitin from the pupa was as the follows: Pupa skin were dipped in 4%HCl for 20h in 35°C , then in 6%NaOH for 4h in 85°C, followed by decoloring in 10% H2O2 for 0.5h under 85°C. Under this conditions, the produced chitin was white flaky solid with 6.5%-9.5% water content, 0.65%-0.97% ash content and 5.78%-6.67% nitrogen content, the productivity of the processing was 28%. Its quality indexes reached that of edible chitin.
B. S. Yang et al., "Studies on Extraction Technique of Chitin from the Pupa of Dictyoploca Japonica and Quality Test of Product", Advanced Materials Research, Vols. 343-344, pp. 16-21, 2012