Catoggio J A, Succar S D, Roca A E
Center of Environmental Research, School of Sciences, National University of La Plata, Argentina.
Sci Total Environ. 1989 Feb;79(1):43-58. doi: 10.1016/0048-9697(89)90052-1.
Twelve polynuclear aromatic hydrocarbons (PAH) were evaluated by chromatographic procedures using a HPLC-UV detector and a GC-FID detector. The PAH were evaluated in airborne particulate matter collected in La Plata, Argentina, over a period of 2 years (with sampling periods of approximately 4 months). The samples were size fractionated, and the PAH in each fraction determined. The analytical procedure used was as follows: extraction in benzene, concentration at room temperature, clean-up in a silica gel column and, finally, evaluation by chromatographic procedures. The extraction recovery was 76.2 +/- 5.8% for naphthalene and 96.0 +/- 6.2% for chrysene. Clean-up recovery was 87.8 +/- 7.15% for phenanthrene and 98.1 +/- 8.3% for anthracene. The largest PAH load was present in the smallest fractions. The smallest particles were carbonaceous in nature. The concentration peak was associated both with the total mass of airborne particulate matter and the reduction in amounts of coarse particles. The PAH distribution could not be correlated with characteristic physicochemical properties such as water solubility or the octanol-water distribution coefficient. The PAH load was greater in fall and winter than in spring and summer. This could be attributed to the reduction of photochemical processes during the cold seasons.
使用高效液相色谱 - 紫外检测器和气相色谱 - 火焰离子化检测器的色谱程序对12种多核芳烃（PAH）进行了评估。对在阿根廷拉普拉塔采集的为期2年（采样周期约为4个月）的空气中颗粒物中的PAH进行了评估。对样品进行了粒度分级，并测定了每个级分中的PAH。所采用的分析程序如下：用苯萃取，室温浓缩，在硅胶柱上净化，最后通过色谱程序进行评估。萘的萃取回收率为76.2±5.8%，芘的萃取回收率为96.0±6.2%。菲的净化回收率为87.8±7.15%，蒽的净化回收率为98.1±8.3%。最大的PAH负荷存在于最小的级分中。最小的颗粒本质上是碳质的。浓度峰值与空气中颗粒物的总质量以及粗颗粒数量的减少有关。PAH的分布与诸如水溶性或正辛醇 - 水分配系数等特征理化性质无关。秋季和冬季的PAH负荷高于春季和夏季。这可能归因于寒冷季节光化学过程的减少。
