간편한 DNPH 유도체화 HPLC 분석법을 이용한 화장품 중 포름알데하이드 분석

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최종근
Choi, Jongkeun

  • 투고 : 2015.12.22
  • 심사 : 2016.03.15
  • 발행 : 2016.03.30

초록

대한민국 식품의약품안전처(식약처)는 포름알데하이드 분석법으로 2,4-dinitrophenylhydrazine(DNPH) 유도체화-고성능액체크로마토그래프법(HPLC)을 고시하고 있다. 본 연구는 고시법의 복잡한 시료 전처리 과정을 개선하여 화장품 분석에 편리하게 사용할 수 있는 유도체화법을 개발하고자 수행되었다. 전처리법을 간단하게 하기 위하여 pH, 시간 및 온도 등 반응조건을 최적화하였다. 이 전처리법은 초산염 완충액(pH 5.0)을 사용한 검액의 pH 조정, 디클로로메탄을 사용한 액-액 분획 그리고 감압농축기를 사용한 증발건조와 같이 식약처 고시법의 복잡한 과정이 필요 없다. 유도체화 과정을 통하여 생성된 formaldehyde dinitrophenylhydrazone(formaldehyde-DNP)는 식약처의 시험방법을 약간 변형한 역상 HPLC법으로 분리하고 정량하였다. 2 ~ 40 ppm 농도 범위의 표준액들을 가지고 수행한 검량선 작성 결과, 본 시험법은 상관계수 값이 0.9999로 좋은 직선성을 보여주었다. 본 실험의 최소검출한계(LOD)와 최소정량한계(LOQ)는 각각 0.2 ppm과 0.5 ppm이었다. 또한 회수율 실험결과는 실험방법이 매우 정확하고 재현성이 높음을 보여주었다. 따라서 본 연구에서 제안된 시험법은 화장품 중 포름알데하이드를 신속하게 분석하는데 적용될 수 있을 것이다.

키워드

cosmetic;2,4-dinitrophenylhydrazine (DNPH);formaldehyde;pre-column derivatization;HPLC

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과제정보

연구 과제 주관 기관 : 청운대학교