Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Analysis of Vitamin K1 in Commonly Consumed Foods in Korea

국내에서 소비되는 상용 식품의 비타민 K1 함량 분석

  • Lee, Seongeung (Department of Food Science and Biotechnology, Chungbuk National University) ;
  • Sung, Jeehye (Department of Food Science and Biotechnology, Chungbuk National University) ;
  • Choi, Youngmin (Department of Agrofood Resources, Rural Development Administration) ;
  • Kim, Youngwha (School of Food Biotechnology and Nutrition, Kyungsung University) ;
  • Jeong, Heon-Sang (Department of Food Science and Biotechnology, Chungbuk National University) ;
  • Lee, Junsoo (Department of Food Science and Biotechnology, Chungbuk National University)
  • 이성응 (충북대학교 식품생명공학과) ;
  • 성지혜 (충북대학교 식품생명공학과) ;
  • 최용민 (농촌진흥청 농식품자원부) ;
  • 김영화 (경성대학교 식품응용공학부) ;
  • 정헌상 (충북대학교 식품생명공학과) ;
  • 이준수 (충북대학교 식품생명공학과)
  • Received : 2015.04.27
  • Accepted : 2015.06.10
  • Published : 2015.08.31
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Abstract

Vitamin $K_1$ (phylloquinone) content of commonly consumed foods in Korea were determined by solvent extraction followed by reversed-phase liquid chromatography using post-column derivatization and fluorescence detection. Samples were obtained in the years of 2013 and 2015. In this study, 46 vegetables, 14 fruits, and 6 legumes were analyzed. Relatively higher amounts of vitamin $K_1$ were found in sweet potato leaves, green kiwi, and mung beans among vegetables, fruits, and legumes, respectively. The content of vitamin $K_1$ in vegetables including spinach, broccoli, and potato ranged from non-detectable (ND) to $1,467.3{\mu}g/100g$. The content of vitamin $K_1$ in fruits ranged from ND to $42.7{\mu}g/100g$. The content of vitamin $K_1$ in legumes, including soybeans, mung beans and peas ranged from 1.7 to $63.4{\mu}g/100g$. In addition, the analytical method validation parameters including recovery, reproducibility, repeatability, peak purity, and linearity were calculated to ensure the method's validity. The results showed high linearity with a correlation coefficient of 0.9999. Overall recovery was close to 100% (n=5). This study revealed reliable vitamin K content in commonly consumed foods in Korea for a nutritional information and food composition database.

본 연구에서는 국내에서 소비되는 일부 상용식품의 비타민 $K_1$ 함량을 측정하고자 하였으며, 이 분석방법을 검증하며 결과의 신뢰도를 확보하고자 하였다. 각 식품군의 비타민 K는 용매추출법을 이용하여 추출하였으며, 포스트칼럼이 장착된 역상 HPLC를 통하여 분리, 정량하였다. 채소류에서는 고구마 잎이 $1,467.3{\mu}g/100g$으로 가장 높았으며, 과일류는 녹색 키위가 $42.7{\mu}g/100g$으로 가장 높게 분석되었다. 두류에서는 녹두가 $63.4{\mu}g/100g$으로 가장 높은 값을 나타내었다. 분석방법을 검증하기 위하여 직선성, 재현성, 반복성, 회수율 및 peak purity를 구하였으며 분석관리 차트를 작성하여 분석 결과 값을 관리하였다. 그 결과 본 시험법에서 표준물질의 피크 머무름시간과 모시잎 시료의 피크 머무름시간이 일치하여 특이성을 확인하였다. 검량선의 상관 계수는 0.9999 이상으로 높은 유의 수준을 보여 분석에 적합함을 알 수 있었으며, 반복성과 재현성의 변동계수는 각각 2.33, 3.93%로 나타났고 회수율은 103.67%로 우수하게 나타났다. 본 연구에서 분석된 자료는 표준화된 식품성분표의 기초 자료로 이용될 수 있을 것으로 판단된다.

Keywords

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