Sciadonic acid (SA, Δ5,11,14–20:3) is an unusual fatty acid found in Torreya grandis kernel oil with significant health benefits and functional value. However, obtaining high-purity SA from crude oil remains a challenge. In this study, we developed an efficient, eco-friendly, and selective method for SA enrichment using silver ion (Ag + )-loaded molecularly imprinted polymers (MIPs). Methacrylic acid (MAA) was selected as the functional monomer, with SA as the template molecule and AgNO 3 as the complexing agent. The polymerization was carried out using reversible addition-fragmentation chain transfer (RAFT)-modified Fe 3 O 4 @SiO 2 . Furthermore, adsorption studies revealed that the process followed the Langmuir isotherm model, while the adsorption kinetics were best described by the Pseudo-second-order model, with a maximum binding capacity of 97.04 mg/g. Then, Optimization experiments showed that the highest adsorption efficiency (84.62 %) was achieved using 20 mg of MIPs at 30 °C for 30 min. Desorption was most effective with n-hexane/acetic acid (9:1, v/v) for 8 h, yielding a desorption efficiency of 70.65 %. As a result, the final SA purity reached 93.11 %, with a recovery rate of 65.03 %. This novel Ag + -loaded MIPs strategy provides a rapid, selective, and environmentally friendly approach for SA enrichment, demonstrating the great potential for industrial application.
Roasting Chinese torreya ( Torreya grandis cv. Merrillii ) kernels significantly influences the quality of oil. However, the changes of oxidative stability of T. grandis kernel oil are still unclear. Herein, oxidative stability index (OSI) was conducted to investigate the oil obtained at different roasting temperatures (60°C, 90°C, 120°C, and 150°C) and duration (25, 50, 75, 100 and 125 minutes). Furthermore, Maillard reaction, antioxidant compounds, microstructure and widely targeted lipidomics analysis were integrated to analyze the changes of kernels and oils roasted at 150°C. Roasting kernels at 150°C for 25 min resulted in the highest oil yield and disrupted the cellular structure, facilitating the release of tocopherols. 150°C, 25 min roasting had a pronounced effect on the lipid composition, particularly on phosphatidylcholines (PCs) and lyso-phosphatidylcholines (LPCs). A total of 26 lipids emerged as potential markers for distinguishing T. grandis kernel oils with varying roasting intensities, primarily associated with glycerophospholipid metabolism. Pearson correlation showed that the increase of tocopherols and LPC (LPC (22:5), P173) may contribute to enhanced OSI (8.13 h). These findings provide new insight into the change mechanism of oxidative stability in T. grandis oil obtained from high-temperature pretreatment.
危险品化学品经营许可证（带存储）