Polycyclic aromatic hydrocarbons (PAHs) in the aerosol in Beijing, China, measured by aminopropylsilane chemically-bonded stationary-phase column chromatography and HPLC/fluorescence detection
Polycyclic aromatic hydrocarbons (PAHs) in the aerosol in Beijing, China, measured by aminopropylsilane chemically-bonded stationary-phase column chromatography and HPLC/fluorescence detection
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DOI：
10.1016/j.chemosphere.2006.01.064
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发表时间：
2006-10-01
期刊：
影响因子：
8.8
通讯作者：
Zhang, Dihan
中科院分区：
文献类型：
--
作者：
Okuda, Tomoaki;Naoi, Daisuke;Zhang, Dihan
建立了一种测定中国大气气溶胶中多环芳烃（PAH）浓度的分析方法。我们使用加速溶剂萃取（ASE）方法从气溶胶样品中提取多环芳烃，以减少萃取时间和溶剂用量。开发了最佳纯化方法，氨丙基硅烷化学键合固定相柱色谱法，以去除许多不能通过使用硅胶柱色谱法的常规纯化方法去除的共萃取物。采用高效液相色谱荧光检测器（HPLC/FLD）作为分析方法，因为它对多环芳烃具有很高的灵敏度，并且与GC/MS相比，它易于安装、操作和维护。利用该方法对2003年10月至2005年4月在北京采集的大气气溶胶样品中多环芳烃的浓度进行了测定。EPAHs是所有检测到的多环芳烃浓度的总和，为1.77.8 +/- 239.9 ng m（-3）（n = 64）。采暖季的F_PAHs浓度（305.1 ± 279.0 ng m（-3），n = 33）是非采暖季（42.3 ± 32.0 ng m（-3），n = 33）的7.2倍。大气中PAH浓度的这种强烈的季节性变化可能是由于冬季居民供暖的燃煤。(c)2006爱思唯尔有限公司保留所有权利。
We developed a useful analytical method for the determination of polycyclic aromatic hydrocarbons (PAH) concentrations in the aerosol of China. We used an accelerated solvent extraction (ASE) method for the extraction of PAHs from the aerosol samples, in order to reduce the extraction time and the solvent volume used. The optimum purification method was developed, with aminopropylsilane chemically-bonded stationary-phase column chromatography, in order to remove many co-extractives which cannot be removed by conventional purification methods using silica-gel column chromatography. HPLC/fluorescence detection (FLD) was adopted as the analytical method, because it has very high sensitivity to PAH and it is easy to install, operate, and maintain as compared with GC/MS. With the analytical method developed in this study, the recovery and precision (RSD) for most of the PAHs ranged from 75% to 129% and from 2.8% to 22.7%, respectively. The concentrations of PAHs in the aerosol samples collected from October 2003 to April 2005 in Beijing, China were determined using the newly developed method. EPAHs, which is the sum of the concentrations of all detected PAHs, was 1.77.8 +/- 239.9 ng m(-3) (n = 64). The F_PAHs concentration in the heating season (305.1 +/- 279.0 ng m(-3), n = 33) was 7.2 times higher than that in the non-heating season (42.3 +/- 32.0 ng m(-3), n = 33). These strong seasonal variations in atmospheric PAH concentration are possibly due to coal combustion for residential heating in winter. (c) 2006 Elsevier Ltd. All rights reserved.