中文摘要：

使用居里点热解析（CPP）-GC/MS联用法对气溶胶中有机化合物进行了分析.结果表明,在使用445℃箔片并保持60s加热、GC-MS 30psi脉冲无分流进样的条件下,目标化合物的分析达到了最佳效果.新建立的CPP-GC/MS联用分析方法中,C16～C26烷烃的检测限为0.04～0.08ng,C27～C34烷烃的检测限为0.1～0.5ng,PAHs的检测限为0.01～0.1ng,藿烷类物质的检测限为0.08ng.标准物质分析的相对标准偏差（RSD）为2.1%～20.6%,PM2.5样品的RSD在3.6%～21.3%,70%的目标化合物的工作曲线的线性（R2）在0.99以上.实验表明,CPP-GC/MS联用的方法能较好地替代传统的溶剂提取法来分析气溶胶中的烃类有机物,尤其是可用于分析颗粒物负载量很小的样品,如多级采样器采集的气溶胶粒径分布样品.

英文摘要：

The traditional solvent extraction-GC/MS method for analyzing hydrocarbon compounds in aerosols is improved by coupling Curie-point pyrolysis and GC/MS（CPP-GC/MS）.The best conditions for the new method are using foil of 445℃,holding 60s for heating,and 30psi pulse splitless injection for GC/MS.For this new method,the detection limits are 0.04～0.08ng for C16～C26 alkanes,0.1～0.5ng for C27～C34 alkanes,0.01～0.1ng for PAHs,0.08ng for hopanes.Relative standard deviations（RSD） are 2.1%～20.6% for standards and 3.6%～21.3% for PM2.5 samples.70% of the target compounds have calibration curves with linear regression（R2） of over 0.99.This study indicates that,the new method of CPP-GC/MS can effectively substitute the traditional method to analyze hydrocarbons in aerosols,and especially,it can be used to analyze low-loading aerosol samples,such as size-segregated samples for the study of aerosol size distribution.