Determination of 18 Polycyclic Aromatic Hydrocarbons Migrated from Asphalt Based Waterproof Coating by Solid Phase Microextraction/Gas Chromatography-Mass Spectrometry

KeyWord:solid phase microextraction(SPME)  gas chromatography-mass spectrometry(GC-MS)  polycyclic aromatic hydrocarbons(PAHs)  asphalt based waterproof coating  migration

Abstract:

      A gas chromatography-mass spectrometry(GC-MS) with solid phase microextraction(SPME) was developed for the determination of 18 polycyclic aromatic hydrocarbons(PAHs) migrated from asphalt based waterproof coating.Influences of fibers species,extraction time,mixing speed and temperature on extraction efficiency were investigated.Under the optimized experimental conditions,good linearities were obtained for 18 PAHs in the range of 1-100 ¦Ìg/L with their correlation coefficients(r) of 0ª±992 8-0ª±998 9 and the detection limits of 0ª±03-0ª±09 ¦Ìg/L.The average recoveries at three spiked levels of 1,10,100 ¦Ìg/L were in the range of 71%-94% with the relative standard deviations(RSD,n=6) of 2ª±8%-8ª±6%.The proposed method was applied in the migration analysis on five asphalt based waterproof coatings.Results showed that the PAHs in migratory fluid were detected,in which most were those with 4 rings below.The method is suitable for the determination of 18 PAHs migrated from asphalt based waterproof coating.