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Improvement of Analysis Methods for Fatty Acids in Infant Formula by Gas Chromatography Flame-Ionization Detector

GC-FID를 이용한 조제유류 중 지방산 분석법 개선 연구

  • Hwang, Keum Hee (Nutrition and Functional Food Research Team, National Institute of Food and Drug Safety Evaluation) ;
  • Choi, Won Hee (Nutrition and Functional Food Research Team, National Institute of Food and Drug Safety Evaluation) ;
  • Hu, Soo Jung (Nutrition and Functional Food Research Team, National Institute of Food and Drug Safety Evaluation) ;
  • Lee, Hye young (Nutrition and Functional Food Research Team, National Institute of Food and Drug Safety Evaluation) ;
  • Hwang, Kyung Mi (Nutrition and Functional Food Research Team, National Institute of Food and Drug Safety Evaluation)
  • 황금희 (식품의약품안전평가원 영양기능연구과) ;
  • 최원희 (식품의약품안전평가원 영양기능연구과) ;
  • 허수정 (식품의약품안전평가원 영양기능연구과) ;
  • 이혜영 (식품의약품안전평가원 영양기능연구과) ;
  • 황경미 (식품의약품안전평가원 영양기능연구과)
  • Received : 2020.07.24
  • Accepted : 2020.12.31
  • Published : 2021.02.28

Abstract

The purpose of this research is to improve analysis methods of determining the contents of fatty acids in infant formulas and follow-up formulas. A gas chromatography (GC) method was performed on a GC system coupled to flame ionization detector, with a fused silica capillary column (SP2560, 100 m×0.25 mm, 0.20 ㎛). The method was validated using standard reference material (SRM, NIST 1849a). Performance parameters for method validation such as specificity, linearity, limits of detection (LOD) and quantification (LOQ), accuracy and precision were examined. The linearity of standard solution with correlation coefficient was higher than 0.999 in the range of 0.1-5 mg/mL. The LOD and LOQ were 0.01-0.06 mg/mL and 0.03-0.2 mg/mL, respectively. The recovery using standard reference material was confirmed and the precision was found to be between 0.8% and 2.9% relative standard deviation (RSD). Optimized methods were applied in sample analysis to verify the reliability. All the tested products had acceptable contents of fatty acids compared with component specification for nutrition labeling. The result of this research will provide efficient experimental information and strengthen the management of nutrients in infant formula and follow-up formula.

본 연구는 조제유류 중 지방산에 대해 최신 분석법을 마련하고자 수행하였다. 조제유류 중 지방산 함량 분석을 위해 GC를 이용한 분석법을 확립하고 시중에 유통 중인 제품을 대상으로 적용성을 검토하였다. 분석법 검증은 특이성, 직선성, 검출한계 및 정량한계, 정확성, 정밀성에 대해 수행되었다. Linoleic acid 및 α-linolenic acid의 0.1-5 mg/mL 농도범위에서 R2=0.999 이상의 우수한 직선성을 확인할 수 있었다. Linoleic acid 및 α-linolenic acid의 LOD는 각각 0.06 mg/mL, 0.01 mg/mL, LOQ는 각각 0.16 mg/mL, 0.03 mg/mL였다. 표준인증물질 분석을 통해 정확성을 검토하였으며, linoleic acid 및 α-linolenic acid의 회수율은 각각 100.8%와 101.1%로 확인하였다. 정밀성을 검토한 결과 시료 채취량에 따른 반복성은 linoleic acid 1.4-2.9%, α-linolenic acid 1.1-2.7%이었고, 실험실간 재현성은 각각 2.8%, 1.5%임을 확인하였다. 본 연구에서 확립된 분석법을 적용하여 국내 유통 중인 조제유류 및 조제식 제품 12건에 대해 적용성 검토를 실시한 결과 전체 시료에서 분석이 용이하였으며, 모두 기준·규격에 적합함을 확인하였다. 본 결과로부터 확립된 GC를 이용한 분석법은 조제유류 중 지방산 함량을 확인하기에 적합함을 확인하였으며 국내 식품 영양성분의 관리 기반을 강화하는데 기여할 것으로 사료된다.

Keywords

References

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