Supercritical Fluid Clean-Up of Environmental Samples for the Analysis of Polycyclic Aromatic Hydrocarbons Using Time-of-Flight Secondary Ion Mass Spectrometry
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- SAKAMOTO Tetsuo
- Institute of Industrial Science, The University of Tokyo
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- YAMAMOTO Azusa
- Faculty of Science and Engineering, Tokyo University of Science
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- OWARI Masanori
- Environmental Science Center, The University of Tokyo
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- NIHEI Yoshimasa
- Faculty of Science and Engineering, Tokyo University of Science
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Abstract
A novel sample-pretreatment method for time-of-flight secondary ion mass spectrometry (TOF-SIMS) was developed using supercritical fluid extraction (SFE). In SFE, the extraction efficiency of a certain organic matter is controlled by the pressure and temperature of supercritical CO2. Two-step SFE (1st step at 10 Mpa, 40°C; 2nd step at 30 MPa, 120°C) was applied to diesel exhaust particles containing many kinds of n-alkanes and aromatic species. n-Alkanes and polycyclic aromatic hydrocarbons (PAHs) were extracted in the 1st and 2nd steps, respectively. This selectivity was utilized for the sample preparation of TOF-SIMS analysis. Diesel exhaust particles after the 1st step of extraction were analyzed with TOF-SIMS, aiming at PAHs as analytical targets. The obtained spectrum was simplified, and mass peaks of individual PAHs were easily assigned, because unwanted compounds, like n-alkanes, were selectively removed by SFE. Furthermore, a simple calculation elucidated the outline of the spectrum.
Journal
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- Analytical Sciences
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Analytical Sciences 20 (10), 1379-1382, 2004
The Japan Society for Analytical Chemistry
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Keywords
Details 詳細情報について
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- CRID
- 1390001204256342912
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- NII Article ID
- 10013657205
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- NII Book ID
- AA10500785
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- COI
- 1:CAS:528:DC%2BD2cXovVeksLY%3D
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- ISSN
- 13482246
- 09106340
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- NDL BIB ID
- 7111330
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- PubMed
- 15524186
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- Abstract License Flag
- Disallowed