Development of Analytical Method for Propylene Glycol in Foods

식품 중 프로필렌글리콜의 분석법 개발

  • 김희연 (경인지방식품의약품안전청 시험분석팀) ;
  • 홍기형 (식품의약품안전청 식품첨가물팀) ;
  • 최장덕 (식품의약품안전청 연구기획조정팀) ;
  • 박성관 (식품의약품안전청 식품첨가물팀) ;
  • 정시섭 ((주)랩프런티어) ;
  • 최우정 (식품의약품안전청 식품오염물질팀) ;
  • 이신호 (대구가톨릭대학교 식품.외식산업학부) ;
  • 문동철 (충북대학교 약학대학)
  • Published : 2005.12.31

Abstract

Standardized method based on extraction, filtration, and gas chromatography (GC) was developed far propylene glycol analysis to set hygienic norm of safety measure for foods under governmental control. Various columns were tested fur propylene glycol analysis by GC with flame ionization detector. Known amount of propylene glycol was spiked into wheat flour dough and analyzed by developed method. Results showed 101.60% recovery rate for propylene glycol with HP-5 column. Reproducibility test of standards recorded 0.30 for standard variation and 0,42% for relative variation. Using analytical method established, contents of propylene glycol in more than hundred different foods were monitored. Propylene glycol was detected in most foods, indicating propylene glycol is not only commonly added during food preparation, but also is contained naturally in food.

본 연구는 프로필렌글리콜을 분석하기 위한 시료 전처리방법 및 GC조건을 확립한 후, 이 방법을 토대로 다양한 시료들을 분석하여, 분석법의 적용가능 여부를 파악하고자 하였다. 이를 위해 전처리방법, 컬럼 및 GC조건을 달리하여 실험하였고, HP-5 capillary column을 사용하여 프로필렌글리콜 표준용액을 3회 반복하여 GC/FID로 분석한 결과, 표준편차는 0.30, 상대표준편차는 0.42%를 나타냈으며 검량선을 통해 상관계수$(R^2)$가 0.9996임을 확인하였다. 또한 밀가루 반죽에 표준시료를 첨가 후 회수율을 측정한 결과, 101.60%의 회수율을 보였다. 이상의 조건으로 117개 식품에 대한 프로필렌글리콜 함량을 조사한 결과, 대부분의 시료에서 프로필렌글리콜이 검출되었다. 프로필렌글리콜의 경우 물, 알코올과 잘 혼화되고 독성이 약하며 식품첨가물로 사용할 경우 유화안정제, 보습제, 습윤제, 향료 등의 역할을 하여 견과류가공품, 아이스크림류, 주류, 유제품 등에 다양하게 쓰이고 있기 때문에, 대부분의 시료에서 프로필렌글리콜이 검출되는 것으로 생각되며, 앞으로도 식품에 프로필렌글리콜을 첨가물로서 사용하는 추세가 계속 지속될 것이라고 판단된다.

Keywords

References

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