Synthesis Of Chitosan From Lobster (Nephropidae) Shell Using Reflux Heating Method

Aminati, Salmah
Brilliany, Rhaina Annadroh
Dini Aprilia , Segi Tasya
Arini, Regita Putri
Warahmah, Siti Aisyah Mawaddah
Cahayaningsih, Ananda Capriyati

IJCR (Indonesian Journal of Chemical Research)
Vol. 10 No. 1 (2025): Volume 10, ISSUE 1, 2025

Chitosan synthesis from lobster shell waste (Neurophidae) has been carried out using a conventional heating method using reflux. The synthesis of chitin into chitosan was carried out by demineralization using a 5% (v/v) HCl solution, followed by a deproteination process using a 3.5% NaOH solution with a ratio of 1:10 (w/v) until chitin was formed. The chitin formed was then deacetylated using a 40% (w/v) NaOH solution until chitosan was formed. Analysis of the synthesized chitin and chitosan included confirmation of the FTIR spectra, as well as determining the degree of deacetylation of chitosan. The characterization results showed that lobster shell waste can be synthesized into chitosan using a conventional heating method at a temperature of 50-70 °C for 1 hour. The chitosan formed had a degree of deacetylation of 73.92%. Meanwhile, the yield of chitin was 35% and the yield for chitosan was 13%.