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首页> 外文期刊>Journal of food engineering >Green coffee extracts rich in diterpenes — Process optimization of pressurized liquid extraction using ethanol as solvent
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Green coffee extracts rich in diterpenes — Process optimization of pressurized liquid extraction using ethanol as solvent

机译:富含二萜的绿色咖啡提取物—以乙醇为溶剂的加压液体提取的工艺优化

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摘要

In this study, a pressurized liquid extraction (PLE) was optimized to obtain green coffee extract rich in cafestol and kahweol diterpenes. The effects of temperature (T) and static time (St) (time of contact between the solvent and the matrix during each cycle or batch) on global yield, cafestol and kahweol concentrations and antioxidant activity were studied. The greatest green coffee extract global yield (9.78%) was obtained at 70 degrees C and 8 min St. PLE at 74 degrees C and 6 min St presented the highest concentration of cafestol (20.08 g/kg extract) in the green coffee extract, whereas, the highest kahweol concentration (25.16 g/kg extract) was obtained at 60 degrees C and 6 min St. The extracts showed high DPPH center dot antioxidant activity, particularly after PLE at 50 degrees C and 8 min St (EC50 1.56 mu g/mL of extract). This extract also presented a high total phenolic content (35.99 mg GAE/g of extract). (C) 2018 Elsevier Ltd. All rights reserved.
机译:在这项研究中,优化了加压液体提取(PLE),以获得富含咖啡酚和甘醇二萜的生咖啡提取物。研究了温度(T)和静态时间(St)(每个循环或批次中溶剂与基质之间的接触时间)对总产量,咖啡甾醇和甘草醇浓度以及抗氧化活性的影响。在70°C和8 min St. PLE下,在74°C和6 min St下获得最大的绿色咖啡提取物总收率(9.78%),这是绿色咖啡提取物中咖啡酚的最高浓度(20.08 g / kg提取物),反之,在60摄氏度和6分钟St.时,kahweol浓度最高(提取物为25.16 g / kg)。提取物显示出较高的DPPH中心点抗氧化活性,尤其是在50摄氏度和8 min St的PLE后(EC50为1.56μg) / mL提取物)。该提取物还具有较高的总酚含量(35.99 mg GAE / g提取物)。 (C)2018 Elsevier Ltd.保留所有权利。

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