Selective detection of polyaromatic hydrocarbons on diesel exhaust particles using sputtered neutral mass spectrometry |
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Authors: | Tetsuo Sakamoto Kenji Ohishi Shun‐ichi Hayashi Masaaki Fujii |
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Institution: | 1. Graduate School of Electrical and Electronic Engineering, Kogakuin University, , Hachioji, Tokyo, 192‐0015 Japan;2. Nippon Steel & Sumitomo Metal Corporation, , Futtsu, Chiba, 293‐8511 Japan;3. Chemical Resources Laboratory, Tokyo Institute of Technology, , Yokohama, Kanagawa, 226‐8503 Japan |
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Abstract: | 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. |
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Keywords: | SNMS SIMS REMPI Diesel Soot selective detection PAHs |
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