PAHs (Polycyclic aromatic hydrocarbons) are organic chemicals that are composed of a group of multiple benzene rings having many types of isomers. Some kinds of PAHs are known as toxic or cancer-causing compounds and there are 17 kinds of priority PAHs identified by US EPA (Environmental Protection Agency) and 33 kinds of priority PAHs by WHO (World Health Organization). PAHs are exposed to human in natural source such as volcanic eruptions, crude oils or forest fires and manmade combustion source such as industrial process, fossil fuels or vehicles, etc. Low molecular weight PAHs can be biologically degradated but most of PAHs are generally insoluble in water. The more benzene rings PAHs have, the lower volatility they feature and this produces dusts absorbed with PAHs or residuals compounds on soils or sediments.
This study shows the analysis of PAHs in surface water by YL6900 GC/MS with EPA 8270E (Semivolatile Organic Compounds By Gas Chromatography/Mass Spectrometry).