二级热脱附-气相色谱-质谱联用测定大气可吸入颗粒物中的16种多环芳烃

Determination of 16 polycyclic aromatic hydrocarbons in airborne particle samples using two-step thermal desorption and gas chromatography-mass spectrometry

建立了二级热脱附-气相色谱-质谱联用技术测定大气可吸入颗粒物PM10中16种多环芳烃的分析方法。对二级热脱附和色谱-质谱条件进行了优化。实验结果表明,方法的检出限为0.14～0.42ng/m3,平均加标回收率为52.7%～97.9%,相对标准偏差(RSD)为8.0%～18.4%。与传统方法相比,该方法的样品前处理时间短、有机溶剂的使用量少,是对人体及环境友善的检测技术。该方法已应用于32份实际大气颗粒物样品的分析。

A method for the determination of 16 polycyclic aromatic hydrocarbons（PAHs） in airborne particle samples was developed using two-step thermal desorption and gas chromatography-mass spectrometry（GC-MS）.The thermal desorption conditions and GC-MS parameters were optimized.The results showed that the detection limits（LODs） of this method varied from 0.14 to 0.42 ng/m3.The average recoveries were ranged from 52.7% to 97.9%,and the relative standard deviations（RSD） were ranged from 8.0% to 18.4%.The method was applied to analyze 32 collected airborne particle samples.In comparison with the traditional method,this method can avoid the waste of organic solvents and also shorten the analysis time.It is a green method,and beneficial for the environment and the analysts.