돌산갓의 부위별 sinigrin 함량
Sinigrin content of different parts of Dolsan leaf mustard
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초록
돌산갓에서의 glucosinolates인 sinigrin의 분석법을 확립하기 위해 다양한 용매를 이용하여 추출 후 정성·정량하였다. 돌산갓을 뿌리, 줄기, 잎으로 구분하여 50% CH3CN, 10% NH4Cl, 60% CH2OH, 70% CH3OH 을 이용해 추출 시 50% CH3CN이 가장 sinigrin 함량이 높게 나타났으며 나머지 용매들은 큰 차이가 없었다. 또한 갓 부위별에서 sinigrin함량은 큰 차이가 없었으며 줄기 부위의 50% CH3CN추출물의 sinigrin함량이 728 ppm으로 다소 높게 나타났다. Sinigrin은 농도별로 standard curve를 작성하여 HPLC에 의한 돌산갓 부위별 sinigrin 함량을 정량화 하였고 HPLC로 분석시 UV detector 감도는 242 nm보다 228 nm에서 높게 나타났으며 228 nm에서는 줄기, 뿌리, 잎 순서로 sinigrin함량이 나타났다. 50% CH3CN로 추출한 돌산갓의 chromatogram은 표준물질인 sinigrin의 retention time과 일치하였으며, 잎에서 나타난 peak는 glucosinolates인 glucoraphanin으로 확인되었다. 본 연구의 결과로부터 돌산갓에 함유된 sinigrin 분석을 위한 추출용매는 50% CH3CN, UV detector 파장은 228 nm가 가장 적합하다는 것을 알 수 있었다. 또한, sinigrin의 추출 및 분석이 체계화됨으로써 돌산갓을 이용한 다양한 식품의 저장기간에 따른 sinigrin 함량변화 및 생리기능에 관한 연구에 활용 될 수 있을 것으로 판단된다.
Abstract
The aims of this study was to optimize the extraction conditions of sinigrin from Dolsan leaf mustard. Dolsan leaf mustard (Dolsan-eup, Yeosu-si) harvested during at May 2014 was used for sinigrin extraction. After the extraction of sinigrin using 50% CH3CN, 10% NH4Cl, 60% CH2OH, and 70% CH3OH, the sinigrin content was measured by HPLC analysis. The results showed that sinigrin content was highest with 50% CH3CN solvent extraction and UV detector sensitivity was greater at 228 nm rather than at 242 nm. The sinigrin concentrations of leaf, stem and root with 50% CH3CN extraction were 345 ppm, 728 ppm, and 539 ppm, respectively. After extraction of the different parts of Dolsan leaf mustard, The standard retention time by HPLC analysis of sinigrin content was 2.054, 2.032, 2.059, and 2.035 min from the root, stalk, and leaf, respectively. On the other hand, HPLC analysis showed that the leaf extracts contained glucoraphanin, one of glucosinolates. The optimum time and extraction solvent for the sinigrin extraction from Dolsan leaf mustard was found to be 24 hr with 50% CH3CN solvent. In addition, opotimum UV detector k at 228 nm. These results showed that the optimum extraction conditions for Dolsan leaf mustard were 24 hr extraction with 50% CH3CN solvent. In addition, the optimum wavelength of UV detector was determined to be 228 nm for sinigrin analysis. Therefore, this study could provide a useful information for sinigrin extraction and its systematic analysis during the storage.
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