Optimization of Pigment Extraction from <i>Aristeus alcocki</i> Shell Wastes via Different Solvent Systems

Arabian deep-sea red shrimp Aristeus alcocki is considered to be an ideal source of pigments, especially astaxanthin, and its analogs. Extraction pigments from exoskeleton discards A. was analyzed by using organic solvents, namely, n-hexane, acetone, ethyl acetate, methanol, ethanol under cold hot conditions. A significantly greater yield obtained acetone: methanol (1:1 v/v) (10.4-10.9%) (9.3-9.7%) extractions compared with conventional acetone extract (7.4-8.1%) (p < 0.05). Chromatographic experiments the pigment extracts showed presence free astaxanthin mono-ester, di-ester.