建立了气相色谱-串联质谱法检测食品印刷包装材料中7种指示性多氯联苯(PCBs)的分析方法,考察了基质效应的影响,用浓硫酸和N-丙基乙二胺(PSA)净化基质,发现基质匹配校准法可有效地避免基质增强效应。实验采用超声萃取法提取样品,经过浓硫酸净化、浓缩定容后,用气相色谱-串联四极杆质谱仪在多反应监测模式(MRM)下进行测定。在0.08~10μg/L浓度范围内,由铝/塑、纸/纸复合材料配制的基质标准曲线均呈现出良好线性,线性相关系数大于0.9984,方法的检出限为0.06~0.18ng/g,在2ng/g和10ng/g加标水平下,平均回收率为84.52%~107.21%,相对标准偏差为1.4%~8.0%。方法能消除复杂基质的干扰,可用于食品印刷包装材料中痕量多氯联苯的测定。 A method for the determination of 7 indicative polychlorinated biphenyls (PCBs) in food printing and packaging materials was established by gas chromatography-tandem mass spectrometry (GC-MS / MS). The effects of matrix effects were investigated. Concentration of concentrated sulfuric acid and N-propyl ethylenediamine Purification of the matrix found matrix matching calibration method can effectively avoid matrix enhancement effect. The samples were extracted by ultrasonic extraction and purified by concentrated sulfuric acid. After concentration and concentration, the samples were determined by gas chromatography-tandem quadrupole mass spectrometer in multiple reaction monitoring mode (MRM). In the range of 0.08-10μg / L, the matrix calibration curve prepared by aluminum / plastic / paper / paper composites showed good linearity, the linear correlation coefficient was greater than 0.9984, the detection limit was 0.06-0.18ng / g, At 2ng / g and 10ng / g spiked levels, the average recoveries ranged from 84.52% to 107.21% with relative standard deviations of 1.4% to 8.0%. The method can eliminate the interference of complex matrix and can be used for the determination of trace PCBs in food printing and packaging materials.