Determination of polycyclic aromatic hydrocarbonswith supercritical fluid extractionand chromatography (SFE/SFC )

This paper showed the on - line supercritical fluid extraction and supercritical fluid chro-matography (SFE /SFC) . which have been used for the extraction and analysis of PAHs in the air par-ticulates nearby the coke oven and the traffic island. This method combined the extraction, separationand analysis into one operating procedure. It saves a lot of operation time , and removes the concentrat-ing step of extracts before doing the analysis. This method is simple, rapid and accurate. The averagerecovery of 16 kinds of PAHs is nearly 90 % and relative standard deviation is 1. 9 %- 6. 0%.