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Optimization of microwave-assisted extraction process for blue honeysuckle (Lonicera coerulea L.) using response surface methodology

반응표면분석법을 이용한 댕댕이 기능성성분의 마이크로웨이브추출조건 최적화

  • Park, Daehee (School of Food Science and Technology, Kyungpook National University) ;
  • Lee, Jae-Jun (School of Food Science and Technology, Kyungpook National University) ;
  • Park, Jongjin (School of Food Science and Technology, Kyungpook National University) ;
  • Park, Sanghwan (Muhak Co., Ltd.) ;
  • Lee, Wonyoung (School of Food Science and Technology, Kyungpook National University)
  • Received : 2017.06.14
  • Accepted : 2017.08.08
  • Published : 2017.08.30

Abstract

Functional compounds including flavonoids, anthocyanins, polyphneols and antioxidants were extracted from blue honeysuckle (Lonicera caerulea L.) using highly efficient microwave-assisted extraction. And extraction process was modeled and optimized according to response surface methodology (RSM). The independent variables ($X_n$) were ethanol concentration ($X_1$: 0, 25, 50, 75, 100%), irradiation time ($X_2$: 1, 3, 5, 7, 9 min), and microwave power ($X_3$: 60, 120, 180, 240, 300 W). Dependent variables ($Y_n$) were total flavonoid contents ($Y_1$), total anthocyanin contents ($Y_2$), total polyphenol contents ($Y_3$) and antioxidant activity ($Y_4$). Four-dimensional response surface plots were generated based on the fitted second-order polynomial models to get optimal conditions. Estimated optimal conditions for 4 responses were ethanol concentration of 54-72%, irradiation time of 7.1-7.6 min, and microwave power of 243-251 W. Ridge analysis predicted the maximal responses of total flavonoid content, total anthocyanin content, total polyphenol content and antioxidant activity were 38.00 mg RE/g, 6.80 mg CGE/g, 14.90 mg GAE/g, 89.10%, respectively. Verification experiment was carried out at predicted optimal conditions and experimental values for total flavonoid content, total anthocyanin content, total polyphenol content and antioxidant activity were 38.10 mg RE/g, 6.72 mg CGE/g, 14.91 mg GAE/g and 89.13%, respectively. No significant difference was observed between predicted and experimental values, indicating good fitness of fitted model and successful application of RSM.

본 실험은 댕댕이의 마이크로웨이브 추출장치를 활용한 플라보노이드, 안토시아닌, 폴리페놀, 항산화능 등을 반응표면분석법을 통하여 최적추출조건의 예측과 추출조건에 따른 추출물의 기능성 성분 함량을 모니터링 하였다. 중심합성계획법을 통해 추출공정에 중요한 독립변수인 용액농도($X_1$: 0, 25, 50, 75, 100%), 추출시간($X_2$: 1, 4, 7, 10, 13 min), microwave power($X_3$: 180, 210, 240, 270, 300 W)를 각각 독립변수로 설정하였고, 총 플라보노이드 함량($Y_1$), 총 안토시아닌 함량($Y_2$), 총 폴리페놀 함량($Y_3$) 그리고 DPPH 라디칼 소거능($Y_4$) 등을 종속변수로 하여 회귀분석을 실시하였다. 예측된 최적조건 범위는 에탄올 농도 53-64%, 추출시간 7.4-7.9 min, microwave power 242-250 W로 나타났다. 플라보노이드 함량의 최대점은 에탄올의 농도 52.9%, 추출시간 7.5분, microwave power 244 W일 때 최대값은 65.74 mg RE/g으로 예측되었다. 안토시아닌 함량의 최대점은 에탄올의 농도 54.8%, 추출시간 7.4분, microwave power 248 W일 때 최대값은 0.45 mg CGE/g으로 예측되었다. 폴리페놀 함량의 최대점은 에탄올의 농도 56.9%, 추출시간 7.7분 및 microwave power 250 W 일 때 최대값은 14.71 mg GAE/g로 예측되었다. 항산화능의 최대점은 에탄올의 농도 64.10%, 추출시간 7.9분 및 microwave power 242 W일 때 최대값은 92.54%로 예측되었다. 예측값과 실험값의 차이가 거의 없는 것으로 보아 본 실험은 정확도가 높고 신뢰성이 높음을 확인할 수 있었다. 이와 같은 결과는 댕댕이 마이크로웨이브 추출방법에 있어서 최적의 추출조건에 대한 정보를 주는 것이며, 더 나아가 고농도 댕댕이 기능성 성분이 함유된 제품 개발에 기초정보를 제공하는 결과라 사료된다.

Keywords

References

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Cited by

  1. 반응표면분석법을 이용한 새싹보리 마이크로웨이브 추출공정의 최적화 vol.24, pp.7, 2017, https://doi.org/10.11002/kjfp.2017.24.7.949