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建立了大豆提取物中16种多环芳烃(PAHs)和16种邻苯二甲酸酯类(PAEs)残留的快速检测方法。样品用水溶解、正己烷超声提取,提取液经乙二胺-N-丙基硅烷粉末分散固相萃取净化后,采用气相色谱-三重四极杆串联质谱法在选择反应监测模式下进行测定。结果表明:32种化合物在0.01～5.0μg/mL范围内呈良好线性,相关系数不低于0.99,方法的检测限为0.1～10.0μg/kg。在30～100μg/kg加标水平下的回收率为62.1%～126.9%,RSD为3.2%～15%。方法适用于大豆提取物中PAHs和PAEs的测定。
A rapid method for the determination of 16 polycyclic aromatic hydrocarbons (PAHs) and 16 kinds of phthalates (PAEs) in soybean extract was established. The sample was dissolved in water and extracted with n-hexane by sonication. The extract was purified by solid-phase extraction with ethylenediamine-N-propylsilane powder followed by gas chromatography-triple quadrupole tandem mass spectrometry in a selective reaction monitoring mode. The results showed that the 32 compounds showed a good linearity in the range of 0.01-5.0 μg / mL, the correlation coefficient was no less than 0.99, and the detection limit was 0.1-10.0 μg / kg. The recoveries ranged from 62.1% to 126.9% with RSDs ranging from 3.2% to 15% at spiked levels of 30-100 μg / kg. The method is suitable for the determination of PAHs and PAEs in soybean extract.