Selective detection of polyaromatic hydrocarbons on diesel exhaust particles using sputtered neutral mass spectrometry

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.

Resonance-Enhanced Multiphoton Ionization Mass Spectrometry (REMPI-MS): Applications for Process Analysis

“…To desorb the particles, either a CO 2 laser (84, 85) or a thermal desorption unit (86) was applied, and PAH in the gas phase were ionized by a KrF excimer laser (248 nm), taking place in the same volume following a two-step desorption/ionization scheme. Sakamoto et al (87) presented an interesting approach, as they sampled diesel exhaust particles on an indium surface. The particles were then irradiated by a Ga beam, and desorbed material was postionized by a tunable laser at a wavelength of 250 nm.…”

Development of a Simple System for the Analysis of Water-Containing Biological Samples by TOF-SIMS

“…However, it is difficult to focus the cluster ion beam on a small spot, and the spatial resolution is thus limited to a few * This paper was presented at the 10th International Symposium [3,4]. In this laboratory, high spatial resolution imaging, enough for single cell analysis, has been realized by developing an FIB-TOF-SIMS [5][6][7].…”