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Determination of Aflatoxins in Nuts, Their Products and Dried Fruits Using Rapid Resolution Liquid Chromatography Coupled with Tandem Mass Spectrometry

RRLC-MS/MS를 이용한 견과류 및 그 가공품과 건조과실류의 아플라톡신 분석

  • Choi, Su-Jeong (Seoul Metropolitan Government Research Institute of Public Health and Environment) ;
  • Park, Ju-Sung (Seoul Metropolitan Government Research Institute of Public Health and Environment) ;
  • Jung, So-Young (Seoul Metropolitan Government Research Institute of Public Health and Environment) ;
  • Son, Yeo-Joon (Seoul Metropolitan Government Research Institute of Public Health and Environment) ;
  • Lyi, Yun-Jeong (Seoul Metropolitan Government Research Institute of Public Health and Environment) ;
  • Kim, Mi-Sun (Seoul Metropolitan Government Research Institute of Public Health and Environment) ;
  • Park, So-Hyun (Seoul Metropolitan Government Research Institute of Public Health and Environment) ;
  • Lee, Sang-Me (Seoul Metropolitan Government Research Institute of Public Health and Environment) ;
  • Chae, Young-Zoo (Seoul Metropolitan Government Research Institute of Public Health and Environment)
  • Received : 2011.06.07
  • Accepted : 2011.09.08
  • Published : 2011.12.31

Abstract

The occurrence of aflatoxins $B_1$, $B_2$, $G_1$ and $G_2$ in nuts, their products and dried fruits was investigated. Samples were collected from local markets in Seoul and analyzed by rapid resolution liquid chromatography coupled with tandem mass spectrometry using an immunoaffinity column. The chromatography method was validated for assay of aflatoxins using linearity, accuracy, precision and limit of detection and quantification. The linearity in the concentration ranged from 0.10 to $20{\mu}g/kg$ with $R^2$ > 0.9999. Sample recoveries ranged from 71.1 to 97.2% with relative standard deviations below 4.5% for spiking levels from 1 to $10{\mu}g/kg$. The limits of detection ranged between 0.02 and $0.05{\mu}g/kg$ and the limits of quantification ranged between 0.05 and $0.10{\mu}g/kg$. The levels of aflatoxin $B_1$, $B_2$, $G_1$ and $G_2$ in nuts, their products and dried fruits were $B_1$ 0.10 to $9.94{\mu}g/kg$, $B_2$ 0.08 to $1.54{\mu}g/kg$, $G_1$ 0.04 to $3.21{\mu}g/kg$ and $G_2$ 0.06 to $0.14{\mu}g/kg$.

국내 유통되는 견과류 및 그 가공품, 건조과실류 총 225건을 대상으로 면역친화성칼럼으로 정제한 후 RRLC-MS/MS을 이용하여 아플라톡신에 대한 오염도를 조사하였다. 보다 효율적인 아플라톡신 분석을 위해 RRLC-MS/MS를 이용하여 직선성, 정확성, 정밀성, 검출한계 및 정량한계로 분석법의 유효성 검증을 하였다. 상관계수($R^2$)는 0.9999 이상의 우수한 직선성을 보였고, 아플라톡신의 회수율은 71.1-97.2%였고, RSD는 0.25-4.50%로 우수한 재현성을 나타냈다. 검출한계는 $0.02-0.05{\mu}g/kg$였고, 정량한계는 $0.05-0.10{\mu}g/kg$였다. 확립된 분석법에 의해 분석한 결과 그 오염 수준은 $B_1$$0.10-9.94{\mu}g/kg$, $B_2$$0.08-1.54{\mu}g/kg$, $G_1$$0.04-3.21{\mu}g/kg$,$G_2$$0.06-0.14{\mu}g/kg$였다. 본 연구결과에서 나타난 오염수준은 국내규격 기준 이하였으나, 곰팡이독소의 생성 특이성을 고려한다면 다양한 식품 유형에 대한 지속적인 아플라톡신 함량조사와 함께 다른 곰팡이독소에 대한 연구도 필요하다고 판단된다.

Keywords

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