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Received March 10, 2015
Accepted April 21, 2015
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다양한 용매에서 Soxhlet 추출기를 이용한 감귤 껍질에서 d-limonene 추출의 최적조건 연구
Optimization of d-limonene Extraction from Tangerine Peel in Various Solvents by Using Soxhlet Extractor
충남대학교 화학공학과, 34134 대전광역시 유성구 대학로 99
Department of Chemical Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
ihkim@cnu.ac.kr
Korean Chemical Engineering Research, December 2015, 53(6), 717-722(6), 10.9713/kcer.2015.53.6.717 Epub 30 November 2015
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Abstract
감귤류의 과일 내에 포함된 것으로 알려진 d-limonene 성분은 정유 성분을 추출하여 분리하는 방법으로 얻을 수 있다. 연속 증류 추출법 중 하나인 Soxhlet 추출법을 사용하여 감귤 껍질의 정유 성분을 추출한 후, 역상 HPLC를 통해 정량분석을 하였다. 추출용매의 끓는점과 극성도가 수율에 주는 영향을 알아보기 위해 에탄올, n-헥산, 석유에테르 3가지 용매를 추출 용매로 사용하였다. 120 oC에서 각각의 용매를 1, 2, 4시간 동안 추출했을 때의 시료를 얻어 총 9가지 시료를 분석하였다. 역상 HPLC에서 정량분석을 한 결과, 세 가지 용매 모두 2시간 동안 추출했을 때 d-limonene의 함유량이 가장 많았으며, 이 때 감귤 껍질 1 g당 함유량은 7.77 mg(에탄올), 0.49 mg(n-헥산), 0.28 mg(석유에테르)였다. 에탄올을 사용했을 때 수율이 가장 높은 것으로 보아 용매의 극성도가 끓는점보다 추출 효율에 더 큰 영향을 미치는 것을 알 수 있었다.
D-limonene included in citrus fruits is obtainable to extract essential oil as well as separate the oil ingredient. Soxhlet extraction, a type of SDE (Simultaneous steam Distillation and solvent Extraction), was used to extract limonene from tangerine peel. HPLC analysis was performed to quantify extracted d-limonene by using reversed-phase HPLC column. Results of HPLC analysis showed that the optimal extraction time was 2 hours in any solvent, and the extracted amounts of d-limonene in tangerine peel (per g tangerine peel) were 7.77 mg, 0.49 mg, and 0.28 mg in ethyl alcohol, nhexane, and ether. Because yield was the highest in using ethyl alcohol as a solvent, polarity is stronger factor to effect on yield of extraction than boiling point.
Keywords
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