不同烹调油样品中邻苯二甲酸二丁酯与邻苯二甲酸二(2-乙基己基)酯的分析

Analysis on Di-n-butyl phthalate(DBP) and Di(2-ethylhexyl) Phthalate(DEHP) in Various Samples of Cooking Oil

[目的]了解不同烹调油样品中邻苯二甲酸二丁酯（di-n—butyl phthalate，DBP）与邻苯二甲酸二（2-乙基己基）酯[di（2-ethylhexyl）phthalate，DEHP]的污染情况。[方法]采用气相色谱-质谱联用仪的选择离子检测（SIR）方式，测定取自居民家中未加热食用油、烹调剩油和厨房抽油烟机内油盒中的烹调油烟冷凝物，食堂中未加热食用油、烹调剩油和烹调油烟冷凝物；小摊贩所用的未加热食用油及其锅内剩油；快餐店未加热过的固体起酥油及烹调剩油等样品中DBP与DEHP的含量。[结果]9户居民家庭厨房和食堂不同烹调油样品中DBP和DEHP均为阳性，且烹调油烟冷凝物中的含量明显高于未加热食用油和烹调剩油中的含量；DBP和DEHP含量：前者分别为2．29～597．01μg／g和38．96～4774．72μg／g；后者分别为3．22～42．81μg／g和15．61～112．64μg／g。小摊贩和快餐店不同烹调油样品中，仅1例炸面食剩油检出DBP和DEHP。[结论]大部分烹调油样品被DBP、DEHP污染，且烹调油烟冷凝物中的含量大大增加。

[ Objective ] To determine the concentration of di-n-butyl phthalate （ DBP ） and di （ 2-ethylhexyl ） phthalate （ DEHP ） in various samples of cooking oil. [ Methods ] DBP and DEHP in samples of various kinds of cooking oil, such as unheated cooking oil, heated cooking oil and the condensation of oil fume in domestic kitchens and a canteen; unheated cooking oil and remnant oil in pot used by stall-keepers or by fast food restaurants, were determined by Gas Chromatograph-Mass Spectrometry （ GC-MS ） with selected ion recording （ SIR ） technique. [ Results ] DBP and DEHP in various samples of cooking oil in nine domestic kitchens and a canteen, among which the concentration of DBP （ 2.29-597.01μg/g ） and DEHP （ 38.96-4774.72μg/g ） in the condensation of cooking oil fume were higher than unheated cooking oil or the remnant oil in pot （ DBP 3.22-42.81 μg/g, DEHP 15.61-112.64 μg/g ）. Moreover, DBP and DEHP could be detected in only one sample of remnant oil used by stall-keepers, but not detected in the samples in fast food restaurants. [ Conclusion ] Most samples of cooking oil were polluted by DBP and DEHP, concentrations of which increased significantly in the condensation of cooking oil fume.