Green and efficient extraction of dihydroquercetin from Larix gmelinii logging residue using ultra-high pressure assisted micellar medium: A study on the extraction mechanism

Abstract

Dihydroquercetin (DHQ) exhibited exceptional antioxidant capacity and was widely utilized in the field of food processing. A new method combining green micellar sodium dodecyl sulfate (SDS) with ultra-high pressure extraction (UHPE) was established to extract DHQ from Larix gmelinii Logging Residue (LLR). Under optimal extraction conditions (cycle times of four, extraction pressure of 338 MPa, solid-to-liquid ratio of 1: 25, SDS concentration of 69 mg/mL), the DHQ extraction rate reached 92.08 ± 1.09 %. In vitro antioxidant experiments showed that LLR extract had good antioxidant ability. The key properties of the micellar and the extraction mechanism were analyzed from various perspectives, the enhanced extraction driven by micellar was synergistically coupled with the mass transfer promoted by UHPE, resulting in an efficient extraction. This study emphasizes that utilizing harvesting residues can reduce resource waste while providing valuable food ingredients (DHQ), with both economic and environmental feasibility, and potential applications in the food industries.