A green and efficient approach for the co-extraction of essential oil and pectin from Citrus aurantium L. var. amara Engl. was achieved by combining deep eutectic solvents (DES) with steam distillation. The optimal technological parameters were precisely identified through single-factor, response surface, and machine learning, with the DES concentration of 11.2%, the liquid-solid ratio of 10.6 mL/g, and the distillation time of 56.0 min. Under these conditions, the essential oil yield was 1.33 +/- 0.07%, and pectin yield was 14.50 +/- 0.58%. This process significantly increased the essential o...
