呋喃属于食品热加工过程中产生的潜在致癌物。为准确测定呋喃在食用油中的气液分配系数，采用多次顶空萃取-选择离子流管-质谱法测定封闭体系顶空中的呋喃含量，并根据分配系数定义和多次顶空萃取过程，建立了测定油中呋喃分配系数的数学关系式。结果表明：澳洲坚果油、大豆油、花生油、橄榄油中呋喃的分配系数为338.5、336.4、357.6、365.6（60 ℃时）。本方法具有良好的精密度(RSD＜6.1%)和准确度。该方法简单、实用、不需要呋喃标样，所获得的数学关系式可作为其他挥发性成分分配系数测定的参考。

Furan is a possible human carcinogen (Group 2B). To determine its partition coefficients (K) in edible oils, the furan was detected by the multiple headspace extraction-selected ion flow tube-mass spectrometry and the equation forKwas established and validated. The results showed that theKvalues in macadamia, soy, peanut and olive oils are 338.5, 328.4, 336.4, 318.6 (60 ℃) respectively. The method has an excellent precision (RSD＜6.1%) and good accuracy. This method is simple, practical and does not need the furan standard. The derived equation in this paper is valuable for the determination of theKvalue of other volatile compounds.