본 연구에서 적용한 시험법의 회수율은 97.4-122.5%, 상대표준 편차(RSD)는 6%이내로서 적합한 시험법임을 확인하였다. 조사된 원유 및 시유의 검출농도는 아플라톡신 M<SUB>1</SUB>이 평균 29.6 ng/kg(5.4-72.7 ng/kg)로 나타났으며, 원유 및 시유에 대한 아플라톡신 M<SUB>1</SUB> 오염수준은 현행 식품공전에서 정한 허용기준치인 500 ng/kg 보다 낮은 안전한 수준인 것으로 판단된다.
Raw milk samples (n=28) obtained from milk tanks in 3 dairy plants of different regions and commercial milks (n=100) were collected from six cities. These samples were analyzed for the level of aflatoxin M<sub>1</sub> contamination using immunoaffinity columns and high performance liquid chromatography coupled with fluorescent detectors. Confirmation of aflatoxin M<sub>1</sub> (AFM<sub>1</sub>) identified in positive samples was based on the formation of the hemiacetal derivative (AFM<sub>2</sub>a) after derivatization with trifluroacetic acid. The average concentrations of aflatoxin M<sub>1</sub> in the raw milks were 25.1 ng/kg, and those values in commercial milks were 29.8 ng/kg. The highest level of aflatoxin M<sub>1</sub> in milk was 72.7 ng/kg. These results showed that the contamination of aflatoxin M<sub>1</sub> in milks consumed in the Korea was quite low compared to the standard in Korea Food Code (aflatoxin M<sub>1</sub> 500 ng/kg).