Comparison between urban Toronto PM and selected materials: aerosol characterization using laser ablation/ionization mass spectrometry (LAMS)
| Autor: | Phillip V. Tan, Robert E. Jervis, Sandy Owega, J Tsai, Greg J. Evans, Mike Fila |
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| Rok vydání: | 2002 |
| Předmět: |
Health
Toxicology and Mutagenesis Analytical chemistry Toxicology Mass spectrometry Mass Spectrometry Reference Values immune system diseases hemic and lymphatic diseases Cities Organic Chemicals Particle Size Ionization mass spectrometry Aerosols Ontario Air Pollutants Laser ablation Chemistry Lasers General Medicine bacterial infections and mycoses Pollution Trace Elements Aerosol Characterization (materials science) Certified reference materials Mass spectrum lipids (amino acids peptides and proteins) Inductively coupled plasma Environmental Monitoring |
| Zdroj: | Environmental Pollution. 120:125-135 |
| ISSN: | 0269-7491 |
| DOI: | 10.1016/s0269-7491(02)00135-5 |
| Popis: | Laser ablation/ionization mass spectrometry (LAMS) of particulate matter (PM) was undertaken on-line in order to extend and contrast PM characterization. Qualitative on-line LAMS results for certified materials and Toronto source materials demonstrated the versatility and limitations of the technique. The observation of organic and inorganic components of certified materials verified the proper working condition of the in-house on-line LAMS. Organic and inorganic components of Toronto source materials were also observed with the on-line LAMS. Common components identified from both types of materials were Na, Al, Ca, Fe, and K. Other recognized components were compared with marker elements reported for some common PM emission sources. An in-house off-line LAMS was used to analyze urban Toronto PM deposited on glass substrates, while the on-line LAMS analyzed individual urban Toronto PM particles that were introduced directly into the instrument. Scanning electron microscopy (SEM), X-ray spectrometry and inductively coupled plasma atomic emission spectrometry (ICP-AES) were used for confirmatory purposes. Organic and inorganic components of urban Toronto PM at their typical ng/m3 concentrations were successfully observed in mass spectra using both off-line LAMS and on-line LAMS. Identified ions unique to each analyzed material were compared to identified ions of urban Toronto PM. The ability of LAMS to analyze individual respirable PM particles (viz.2 microns), both for inorganic trace elements and for organic components, greatly extended our capability to characterize PM and also to achieve estimates of concentration contributions of each material. |
| Databáze: | OpenAIRE |
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