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فهرست مقالات

Development of a thermal desorption method for the analysis of particleassociated polycyclic aromatic hydrocarbons in ambient air

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(5 صفحه - از 165 تا 169)

چکیده:

An investigation for the analysis of polycyclic aromatic hydrocarbons in airborne particulates using thermaldesorption and gas chromatography-mass spectrometry is described. Samples are obtained from ambient airusing fibreglass filters and the volatile material from the filter is thermally desorbed to gas chromatograph. A 30meter capillary column is used to separate the hydrocarbons and eight polyaromatic hydrocarbons are used totest the method and recovery is >95%. The eight polycyclic aromatic hydrocarbons anthracene, phenanthrene,fluoranthrene, pyrene, benzo (a) anthracene, chrysene, benzo (a) pyrene and benzo (e) pyrene were the mostabundant PAHs found in the samples of ambient air with current method at Uxbridge-London. Application ofthe measurement of polycyclic aromatic hydrocarbons in ambient air samples shows that the hydrocarbonstrapped in the particle phase to a lesser degree at higher ambient temperature. In conclusion a method has beendeveloped to transfer the PAHs in particle phase from a filter to GC-MS by thermal desorption. A standardmixture of PAHs, when absorbed onto the filter, did lead to strong analyte absorbent interactions by the highpercent recovery of the sample.

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