本文用毛细管气相色谱-负离于化学电离源质谱法（GC-NICIMS）测定了空气颗粒物中的硝基多环芳烃（NO_2-PAH）、通过与标准物的保留时间和质谱图的比较,确定空气颗粒物中含有四种NO_2-PAH,它们是2-硝基芴,9-硝基蒽,1-硝基芘和2-硝基萤蒽,用同一样品进行了毛细管气相色谱正离子电子轰击源质谱分析（GC-EIPIMS）,并与GC-NICIMS进行了比较,结果表明,GC-NICIMS对于NO_2PAH的测定具有较高的选择性和灵敏度,用内标法定量使GC-NICIMS测定结果的精密度得到改善。 In this paper, the determination of NO2-PAH in airborne particulates by GC-NICMS was carried out by comparing the retention time and the mass spectrum of the standard with the GC-NICIMS There are four kinds of NO2-PAH in airborne particles, which are 2-nitrofluorene, 9-nitroanthracene, 1-nitro-pyrene and 2-nitro-fluoranthene. The same sample was used for GC gas chromatography positive ion electron bombardment The results of GC-NICIMS showed that GC-NICIMS had higher selectivity and sensitivity for the determination of NO 2 PAH. The precision of GC-NICIMS was determined by internal standard method Improved.