title: Determination of polycyclic aromatic hydrocarbons with molecular weight 300 and 302 in environmental-matrix standard reference materials by gas chromatography/mass spectrometry.
abstract: An analytical approach based on gas chromatography/ mass spectrometry (GC/MS) is presented for the measurement of polycyclic aromatic hydrocarbons with molecular weight (MW) 300 and 302 in environmental samples. Three different GC stationary phases [5% and 50% phenyl methylpolysiloxane and dimethyl (50% liquid crystalline) polysiloxane] were compared, and retention indexes (RI) are given for 23 individual MW 302 isomers. Identification of MW 300 and 302 isomers in four environmental-matrix Standard Reference Materials (SRMs) (SRM 1597, coal tar extract; SRM 1648 and SRM 1649a, air particulate matter; and SRM 1941, marine sediment) was based on the comparison of RI data and mass spectra from authentic standards. Dibenzo[a,l]pyrene, which is of considerable interest because of its high carcinogenicity, was identified and quantified in the four environmental-matrix SRMs. A total of 23 isomers of MW 302 and four isomers of MW 300 were quantified in four different environmental-matrix SRMs, and the results are compared to previously reported results based on liquid chromatography with fluorescence detection.
authors.affiliation: Analytical Chemistry Division, National Institute of Standards and Technology, 100 Bureau Drive Stop 8392, Gaithersburg, Maryland 20899-8392, USA.
authors.forename: Patricia
authors.initials: P
authors.lastname: Schubert
authors.forename: Michele M
authors.initials: MM
authors.lastname: Schantz
authors.forename: Lane C
authors.initials: LC
authors.lastname: Sander
authors.forename: Stephen A
authors.initials: SA
authors.lastname: Wise
mesh_terms: D004785:Environmental Pollutants / Q000032:analysis / Q000302:isolation & purification; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods* / Q000592:standards; D008970:Molecular Weight; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000302:isolation & purification*; D012015:Reference Standards
chemical_list: D004785:Environmental Pollutants; D011084:Polycyclic Aromatic Hydrocarbons