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Selective detection of polyaromatic hydrocarbons on diesel exhaust particles using sputtered neutral mass spectrometry
Author(s) -
Sakamoto Tetsuo,
Ohishi Kenji,
Hayashi Shunichi,
Fujii Masaaki
Publication year - 2013
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.5284
Subject(s) - chemistry , mass spectrometry , pyrene , mass spectrum , analytical chemistry (journal) , ionization , ultraviolet , diesel fuel , alkane , diesel exhaust , electron ionization , ion , photochemistry , hydrocarbon , chromatography , organic chemistry , materials science , optoelectronics
Aiming for the highly sensitive analysis of aromatic hydrocarbons in organic mixtures, selective ionization using an ultraviolet laser ionization technique was examined for the determination of sputtered neutral species on organic surfaces. The mass spectrum of a model mixture containing pyrene and n ‐alkane showed that only pyrene was ionized and detected, whereas a mass spectrum without laser irradiation, i.e. in the case of secondary ion mass spectrometry, was dominated by many n ‐alkane fragment peaks. This technique was applied for the detection of polyaromatic hydrocarbons adsorbed on diesel exhaust particles. Two kinds of polyaromatic hydrocarbons were clearly detected because many aliphatic fragment signals were suppressed by means of ultraviolet laser ionization. Copyright © 2013 John Wiley & Sons, Ltd.