Idesia Polycarpa ( I. Polycarp a) is a newcomer of edible oil crops in China, with rich oil in ripe fruits. Phenolic compounds in six I.polycarpa oil (whole fruit oil from Leibo, LWFO; pulp oil from Leibo, LPO; seed oil from Leibo, LSO; whole fruit oil from Puan, PWFO; pulp oil from Puan, PPO; and seed oil from Puan, PSO) were analyzed using untargeted metabolomics, and their roles in antioxidant activity were also investigated. Thirty-one phenolic compounds were tentatively identified in I. Polycarpa oils, primarily belonging to salicinoid analogues and p -coumaroyl derivatives; and their contents varied greatly from trace to 85.84 mg/kg oil (idescarpin in LSO). Multivariate analyses clearly differentiated the oils of I.Polycarpa fruit in according to fruit parts and geographical origins, with twelve phenolics as the discrimative markers. Furthermore, phenolic extracts from the oils, especially LSO and PPO, exerted strong scavenging activity toward DPPH and ABTS radicals. Eight phenolics such as dimethyl coniferin, 2-hydroxyphenol-1-O- β -D-glucopyranosyl-(6->1)- α -L-rhamnopyranoside, 1-O-(2-hydroxyethyl)-4-O- p -coumaroyl-glucopyranose, tanegoside A, 1-O-(2-hydroxyphenyl)-4-O- p -coumaroyl- β -D-glucopyranose, mono-O-acetylated p -coumaroyl idesin, and p -coumaroyl salicortin were the crucial compounds that played important roles in antioxidant potential. Overall, the findings suggested these phenolics as chemical markers for the differentiation and functional evaluation of I. Polycarpa oils.
Dan Zhou,Xue Zhou,Qinglong Shi,Jiangbo Pan,Huashu Zhan,Fahuan Ge
High-pressure supercritical carbon dioxide extraction (HPSE) was used for extraction oil from Idesia polycarpa (I. polycarpa) at extraction pressure up to 65 MPa. A series of important process parameters were investigated by response surface methodology (RSM) to obtain high extraction yield. Under the optimum conditions, the highest extraction yield was 21.42 ± 0.31 %. The quality of oil was evaluated in terms of extraction yield, nutritional ingredients such as γ-tocopherol, DL-α-tocopherol, β-sitosterol and squalene, fatty acids profile, antioxidant activity and physicochemical indices of oil and compared to the oil obtained by lower extraction pressures at 35 MPa and 50 MPa, respectively. The results proved that HPSE could increase the I. polycarpa oil extraction recovery and improve the quality of oil with higher nutritional ingredients content, lower acid value and better antioxidant activity. Furthermore, it could not change the fatty acids composition and have no harmful ingredients under the high extraction pressure.
危险品化学品经营许可证（带存储）