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| Optimization of extraction process of chlorogenic acid and total flavonoids from sunflower seed cake with deep eutectic solvent |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.240460 |
| KeyWord:sunflower seed cake chlorogenic acid total flavonoids deep eutectic solvent |
| FundProject:河南省A类专业创建建设专项（HN-HautFood-97）；“十四五”国家重点研发计划项目（2023YFD2100403） |
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| Abstract: |
| In order to promote the high-value utilization of sunflower seed cake, chlorogenic acid and total flavonoids were extracted from sunflower seed cake by deep eutectic solvent(DES). Using 60% ethanol extraction method as the control, and the yields of chlorogenic acid and total flavonoids as the evaluation indexes, the optimal extractant was determined from 11 DES firstly. On this basis, the effects of extraction time, material-liquid ratio, extraction temperature and water content in DES on the extraction efficiency were further investigated to determine the optimal extraction processes of chlorogenic acid and total flavonoids. The results showed that considering both extraction effect and cost, choline chloride-lactic acid (molar ratio 1∶ 2) was determined as the optimal extractant. The optimal extraction conditions for chlorogenic acid were obtained as follows:extraction time 60 min, extraction temperature 70 ℃, material-liquid ratio 1∶ 30 and water content in DES 30%. The optimal extraction conditions for total flavonoids were obtained as follows: extraction time 40 min, extraction temperature 80 ℃, material-liquid ratio 1∶ 40 and water content in DES 50%. Under these conditions, the yields of chlorogenic acid and total flavonoids could reach 18.88 mg/g and 38.04 mg/g, respectively, which were significantly higher than those of the 60% ethanol extraction method. In conclusion, the DES method is more effective in extracting chlorogenic acid and total flavonoids from sunflower seed cake than the traditional ethanol extraction method. |
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