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Approaches to identifying and quantifying polycyclic aromatic hydrocarbons of molecular weight 302 in diesel particulates
Author(s) -
Sauvain JeanJacques,
Vu Duc Trinh
Publication year - 2004
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200301620
Subject(s) - chemistry , particulates , chromatography , analytical chemistry (journal) , diesel fuel , volatility (finance) , polycyclic aromatic hydrocarbon , gas chromatography , environmental chemistry , organic chemistry , financial economics , economics
Among the PAH class of compounds, high molecular weight PAH are now considered as relevant cancer inducers, but not all of them have the same biological activity. However, their analysis is difficult, mainly due to the presence of numerous isomers and due to their low volatility. Retention indices ( Ri ) for 13 dibenzopyrenes and homologues were determined by high‐resolution capillary gas chromatography (GC) with four different stationary phases: a 5% phenyl‐substituted methylpolysiloxane column (DB‐5 ms), a 35% phenyl‐substituted methylpolysiloxane column (BPX‐35), a 50% phenyl‐substituted methylpolysiloxane column (BPX‐50), and a 35% trifluoropropylmethyl polysiloxane stationary phase (Rtx‐200). Correlations for retention on each phase were investigated by using 8 independent molecular descriptors. Ri has been shown to be linearly correlated to PAH volume, polarisability α, Hückel‐π energy on the four examined columns. Ionisation potential Ip is a fourth variable which improves the regression model for DB‐5ms, BPX‐35, and BPX‐50 column. Correlation coefficients ranging from r 2 = 0.935 to r 2 = 0.952 are then observed. Application of these indices to the identification and quantification of PAH with MW 302 in certified diesel particulate matter SRM 1650a is presented and discussed.