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建立了气相色谱-三重串联四极杆质谱测定烘焙食品中15种邻苯二甲酸酯的方法。待测样品采用QuEChERS法进行前处理,采用电子轰击离子源(EI)、多反应监测(MRM)模式测定,外标法定量。15种邻苯二甲酸酯在0.05～8μg/mL范围内浓度与峰面积呈良好的线性关系,方法的检出限为0.025mg/kg,添加水平为0.025,0.050,0.10 mg/kg时15种邻苯二甲酸酯的平均回收率范围分别为89.9%～106%,相对标准偏差范围在3.5%～10%。本方法可用于烘焙食品中邻苯二甲酸酯的定性、定量检测。
A gas chromatographic-triple quadrupole mass spectrometry was developed for the determination of 15 phthalates in bakery products. The samples to be tested were pre-treated by QuEChERS method, and were determined by electron bombardment ion source (EI), multiple reaction monitoring (MRM) mode and external standard method. The concentration of 15 phthalates in the range of 0.05 ~ 8μg / mL showed a good linear relationship with the peak area. The detection limit of the method was 0.025mg / kg and the addition levels were 0.025, 0.050 and 0.10mg / kg The average recoveries of phthalates ranged from 89.9% to 106% with RSDs ranging from 3.5% to 10%. The method can be used for qualitative and quantitative detection of phthalates in baked goods.