气相色谱-离子阱串联质谱法检测大气颗粒物中12种多氯联苯

建立了大气颗粒物中的12种二噁英类多氯联苯的气相色谱/离子阱串联质谱检测方法。优化后的方法定性定量准确度达到最优,12种多氯联苯的方法检出限为0.20~2.00ng/mL,标准曲线相关系数(R2)为0.9901~0.9992,加标回收率为69%~120%,相对标准偏差(RSD)为0.17%~7.94%(n=6)。对4份兰州实际大气样品的检测结果表明,建立的方法灵敏度高、抗干扰能力强,适用于目标化合物含量低、基质背景干扰严重的大气样品分析。

Gas Chromatography-Ion Trap Tandem Mass Spectrometry for the Determination of 12 Kinds of Polychlorinated Biphenyls in Atmospheric Particulate Matter

The method for determination of 12 kinds of polychlorinated biphenyls (PCBs) in the atmospheric particle was established by gas chromatography/ion trap tandem mass spectrometry.The optimized method achieved the optimal qualitative and quantitative accuracy.The detection limits of the method for 12 kinds of PCBs were 0.20-2.00 ng/mL,linear correlation coefficients were 0.9901 0.9992,the average recoveries were 69 ％-120 ％,relative standard deviations were 0.17 ％-7.94 ％ (n =6).The detection results of 4 Lanzhou atmospheric samples show that the method has the advantages of high sensitivity,strong anti-interference ability,and is suitable for the analysis of PCBs in atmospheric samples with low content of the target compound and high background interference.