오가피 추출액의 저장조건에 따른 이화학적 특성변화
Changes of Physicochemical Characteristics of Acanthopanax senticosus Extract during Storage
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초록
오가피 열수추출액의 유통 품질의 변화특성을 규명하기 위하여, 오가피(8~20 mesh)를 열수 추출한 액을 nylon/PE (0.08 mm) pouch로 밀봉포장하거나 포장하지 않고, 가온조건(40, 60℃)에서 10일간 보관하면서 1일 간격으로 이화학적 품질특성을 조사하였다. 보관 중 추출액의 탁도, pH, 총폴리페놀 함량 및 DPPH 유리기 소거능 등은 감소하는 경향을 보였으나 저온과 포장에 의해 감소가 억제됨을 보였다. 적정산도는 고온에서 증가함을 보였으나 포장에 의해 증가가 억제되는 경향이었다. 가용성 고형분 함량은 포장과 온도의 영향을 받지 않고 거의 일정하게 유지되었다. 품질변화 kinetics를 model화 하기 위하여 반응속도론에 상사시켜 본 결과 오가피 추출액의 품질변화는 1차반응 속도식이 적합하였으며 품질변화 속도상수에 대한 온도의 영향은 Arrhenius 식에 잘 따른다고 할 수 있었다. 이상의 결과로 볼 때, 오가피 열수추출액의 부패억제와 항산화능 유지를 위해서는 포장과 저온 유통이 필수적인 것으로 판단된다.
Abstract
This study was conducted to investigate the effects of temperature and packaging on the quality characteristics of hot-water extract from Acanthopanax senticosus. The herb samples, ground and sifted(8~20 mesh), were extracted by a boiling(100℃) water under the atmospheric pressure for 2 hrs. The extract was packed with out nylon PE(0.08 mm) pouch and kept under the condition(40 and 60℃) for 10 days. The reduction of turbidity, pH, polyphenol amount and DPPH radical scavenging activity of extract were retarded by packaging under the low temperature. Titratable acidity was increased with packaging at high temperature. Soluble solid content was not affected by packaging and temperature condition. The changes of quality characteristics followed the first-order reaction rate. Arrhenius equation was applied to determine the effects of temperature on the reaction rate constant, showing high R2. These results suggested that packaging under lower temperature can be utilized for maintaining the quality of A. senticosus extract.
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