中文摘要：

对珠江广州河段沉积物进行粒度分级，每个粒级的样品进行重液分离，收集轻组分和重组分。采用气-质联用仪对其中的多环芳烃（PAHs）进行定量分析，表明PAHs和吸附剂的类型有相关性。

英文摘要：

Wet sieving was performed to separate the sediment into five size fractions and further separated into low （ 〈 1.8 g/cm^3） and high （ 〉 1.8 g/cm^3） density fractions using a cesium chloride solution having a specific gravity of 1.8 ：t： 0.05 g/cm^3. Each of these size and density fractions were then analyzed for PAHs with GC-MS. The results also showed that the PAHs concentration in organic sorbents was correlated with the sorbents.