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LC-MS/MS를 이용한 하귤 (Citrus natsudaidai Hayata) 껍질의 플라보노이드 성분분석: 항산화 활성에 대한 기여

Determination of Flavonoids in the Peel of Citrus Fruit (Citrus natsudaidai Hayata) Using a HPLC-MS/MS: Contribution to the Overall Antioxidant Activity

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초록

감귤류의 껍질은 플라보노이드의 중요한 소스 중의 하나로서 동아시아에서 내장 및 염증성 질환을 치료하는 민간 의약품으로서 사용되어 왔다. 본 연구에서는 하귤 (C. natsudaidai) 껍질에 포함되어 있는 플라보노이드 성분을 고성능액체크로마토그래피-이중질량분석법 (HPLC-MS/MS)으로 10 개 성분을 동정하였다. 플라바논, 플라본 및 쿠마린 유도체는 각각 hesperetin, noviletin 및 coumarin을 사용하여 유효화 하였으며 유효화된 방법으로 정량하였다. 상관계수 (r2)는 >0.9970으로서 높은 값을 보여주었다. LOD는 >0.01 mg/L이었으며 LOQ는 >0.05 mg/L이었다. 플라보노이드의 총량은 9229.7 ± 0.5 mg/kg 이었다. Naringin의 량이 5010.0 ± 4.5 mg/kg으로 가장 많았으며 sinensetin의 량이 0.6 ± 0.1 mg/kg으로 가장 적었다. 항산화력을 25 μg/mL 에서 500 μg/mL의 농도범위에서 DPPH·, ABTS·+, NO· 소거능 및 FRAP의 항으로 분석하였다. 감귤 플라보노이드의 항산화 능력은 시료의 량이 증가하면 증가함을 알 수 있다.

Abstract

The fruit peel of Citruses is an important flavonoid source and used as folk medicines for curing intestine and inflammatory diseases. In this work, 9 flavonoids and one coumarin derivatives in Hagyul (Citrus natsudaidai Hayata) peel were characterized using high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). Flavanones, flavones and coumarin derivative were validated in terms of hesperetin, noviletin and coumarin, respectively, and quantified using the validated methods. Correlation coefficients (r2) were >0.9970, indicating accetable. LOD's and LOQ's were above 0.01 and 0.05 mg/L, respectively. Total amount of the flavonoids were 플9229.7 ± 0.5 mg/kg. The concentration of naringin was highest as 5010.0 ± 4.5 mg/kg and sinensetin was lowest as 0.6 ± 0.1 mg/kg. Antioxidant capacities were evaluated between 25 and 500 μg/mL in terms of DPPH·, ABTS·+ NO· scavenging and FRAP. The antioxidant acitvities of the flavonoids increased dose-dependantly.

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