Physicochemical properties of silver catfish (Pangasius sp.) skin collagen as influenced by acetic acid concentration

Abstract

The aim of this study was to investigate the physicochemical properties of silver catfish skin collagen as affected by acetic acid concentration (0.5M and 0.7M). Acid solubilised collagen (ASC) were isolated from the skin of silver catfish (Pangasius Sp.) and were compared with commercial collagen. The yields of extracted collagen using 0.5M and 0.7M acetic acid were 10.94±0.38% and 5.47±0.20%, respectively. The pH values for commercial collagen and extracted collagen for 0.5M and 0.7M acetic acid values were 6.52±0.04, 4.04±0.06 and 3.79±0.28, respectively. The functional group of collagen was successfully detected, along with a flaky and fibrous morphology structure. The relative viscosity for all samples decreased with an increase in temperature. Collagen extracted with 0.5M acetic acid is more efficient for use as a solvent for collagen extraction since it produces a higher yield and higher fibrous collagen thickness. This study found that collagen extracted from silver catfish (Pangasius sp.) had the potential to be used as alternative fish collagen in various fields.