Optimization of Microwave-Assisted Process for Extraction of Effective Components from Mosla dinthera M.

Response surface methodology (RSM) was applied to microwave-assisted process (MAP) extraction for effective components from Mosla dianthera M. Microwave power (2,450 MHz, 0-160 W) and extraction time (1-5 min) were used as independent variables ($X_i$) for central composite design to yield 10 different extraction conditions. Optimum conditions were predicted for dependent variables of $75\%$ ethanol extracts, such as total yield($Y_1$), total phenolics($Y_2$), total flavonoids($Y_3$), and electron donation ability($Y_4$, EDA). Determination coefficients ($R^2$) of regression equations for dependent variables ranged from 0.8397 to 0.9801, and microwave power was observed to be more influential than extraction time in MAP. The maximal values of each dependent variable predicted at different extraction conditions of microwave power (W) and extraction time (min) were as follows; $6.76\%$ of total yield at 142.00 W and 4.36 min, 78.68 mg/g of total phenolics at 136.78 W and 4.40 min, 6.75 mg/g of total flavonoids at 159,69 W and 3.17 min, and $49.81\%$ of EDA at 133.87 W and 4.47 min, respectively. The superimposed contour maps for maximizing dependent variables illustrated the MAP conditions of 79 to 113 W in power and of 2.73 to 3.84 min in extraction time.

마이크로파 추출공정에 의한 쥐깨풀 유용성분의 추출조건 최적화

마이크로파에 의한 자생식물 쥐깨풀(Mosla dianthera M.)의 유용성분을 효율적으로 추출하고자 중심합성계획에 의해 마이크로파 용량($X_1,\;0\~160$ W)과 추출시간($X_2,\;1\~5$분)을 독립변수로 하여 $75\%$ 에탄을 추출물의 품질특성인 총 수율($Y_1$), 총 페놀성 화합물 함량($Y_2$), 총 플라보노이드 함량($Y_3$) 및 전자공여능($Y_4$)을 각각 종속변수로 하여 10개 조건에 따른 추출방법에 대한 반응표면 회귀분석하였다. 종속변수들에 대한 결정계수($R_2$)는 $0.8397\~0.9801$ 범위로 나타났다. 추출물 성분들의 최대 예측값과 최적 추출조건은 총 수율 $6.76\%$(microwave power 142 W, extraction time 4.36 min), 총 페놀 함량 78.68 $mg\%$(136.78 W, 4.40 min), 총 플라보노이드 함량 6.75 mg/g(159.69 W, 3.17 min) 및 전자공여능 $49.81\%$(133.87 W, 4.47 min)으로 각각 나타났다. 추출물의 기능적 품질특성을 고려한 추출조건 범위는 마이크로파 용량 $79\~l13$ W, 추출시간 $2.73\~3.84$분이었다.