Xie Meng-Xia, Xie Fang, Deng Zhi-Wei, Zhuang Guo-Shun
Analytical and Testing Center, Beijing Normal University, Beijing, China.
Talanta. 2003 Aug 29;60(6):1245-57. doi: 10.1016/S0039-9140(03)00224-8.
The optimum procedures for clean up aerosols in silica solid-phase extraction (SPE) cartridge prior to the analysis of polynuclear aromatic hydrocarbons (PAHs) by gas chromatography-mass spectrum (GC-MS) in selected ion monitoring detection mode have been investigated. The silica SPE cartridge is activated by dichloromethane and hexane, and then dried up by vacuum in SPE instrument for about 5 min. The sample volume loaded on the cartridge is 3 ml and after loading the sample the cartridge was dried in vacuum for 5 min. The PAHs were eluted from the cartridge by 3 ml 20% dichloromethane in hexane. The flow-rate of sample loading and eluting was controlled in about 1 ml min(-1). The aerosols collected on the campus of Beijing Normal University from August 2001 to July 2002 have been processed with these optimum procedures and 16 EPA priority pollution PAHs in the aerosols have been quantitatively determined.
研究了在选定离子监测检测模式下，通过气相色谱 - 质谱联用仪（GC - MS）分析多环芳烃（PAHs）之前，硅胶固相萃取（SPE）柱中气溶胶的最佳净化程序。硅胶SPE柱先用二氯甲烷和己烷活化，然后在SPE仪器中真空干燥约5分钟。加载到柱上的样品体积为3 ml，加载样品后，柱在真空中干燥5分钟。用3 ml 20%二氯甲烷的己烷溶液从柱上洗脱PAHs。样品加载和洗脱的流速控制在约1 ml min⁻¹。采用这些最佳程序对2001年8月至2002年7月在北京师范大学校园收集的气溶胶进行了处理，并对气溶胶中16种美国环境保护局（EPA）优先污染的PAHs进行了定量测定。
