Park, S. Kang, D.H. Jin, C. Kim, H.J. 2024-01-20T02:30:50Z 2024-01-20T02:30:50Z 2021-08-31 2017-02 1226-3311 https://pubs.kist.re.kr/handle/201004/123166 This study aimed to establish an optimal extraction process and high-performance liquid chromatography (HPLC)-photodiode array (PDA) analytical method for determination of marker compounds, dihydrokaempferol (DHK) and 3-O-methylquercetin (3-MeQ), as a part of materials standardization for the development of health functional foods from stems of Opuntia ficus-indica var. saboten (OFS). The quantitative determination method of marker compounds was optimized by HPLC analysis, and the correlation coefficient for the calibration curve showed very good linearity. The HPLC-PDA method was applied successfully to quantification of marker compounds in OFS after validation of the method in terms of linearity, accuracy, and precision. Ethanolic extracts from stems of O. ficus-indica var. saboten (OFSEs) were evaluated by reflux extraction at 70 and 80°C with 50, 70, and 80% ethanol for 3, 4, 5, and 6 h. Among OFSEs, OFS70E at 80°C showed the highest contents of DHK and 3-MeQ of 26.42±0.65 and 3.88±0.29 mg/OFS 100 g, respectively. Furthermore, OFSEs were determined for their antioxidant activities by measuring 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging and lipid peroxidation (LPO) inhibitory activities in rat liver homogenate. OFS70E at 70°C showed the most potent antioxidant activities with IC50 values of 1.19±0.11 and 0.89±0.09 mg/mL in the DPPH radical scavenging and LPO inhibitory assays, respectively. To identify active components of OFS, various chromatographic separation of OFS70E led to isolation of 11 flavonoids: dihydrokaempferol, dihydroquercetin, 3-O-methylquercetin, quercetin, isorhamnetin 3-O-glucoside, isorhamnetin 3-O-galactoside, narcissin, kaempferol 7-O-glucoside, quercetin 3-O-galactoside, isorhamnetin, and kaempferol 3-O-rutinoside. The results suggest that standardization of DHK in OFSEs using HPLC-PDA analysis would be an acceptable method for the development of health functional foods. ？ 2017, Korean Society of Food Science and Nutrition. All rights reserved. Korean Korean Society of Food Science and Nutrition Identification of flavonoids from extracts of Opuntia ficus-indica var. Saboten and content determination of marker components using HPLC-PDA Article 10.3746/jkfn.2017.46.2.210 1 Journal of the Korean Society of Food Science and Nutrition, v.46, no.2, pp.210 - 219 Journal of the Korean Society of Food Science and Nutrition 46 2 210 219 scopus kci ART002201155 2-s2.0-85014744442 Article 3-O-methylquercetin Dihydrokaempferol Health functional foods Opuntia ficus-indica var. saboten Quantitative determination