Urban Aerosol Acids: Analysis of National Institute of Standards and Technology Standard Reference Material 1649
| Autor: | C. M. Sparacino, Marcia Nishioka, S. E. Frazier, Joellen Lewtas |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
chemistry.chemical_classification
Chromatography Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Soil Science Fraction (chemistry) Fractionation Mass spectrometry Pollution Analytical Chemistry chemistry.chemical_compound chemistry Elemental analysis Mass spectrum Environmental Chemistry Gas chromatography Derivatization Waste Management and Disposal Water Science and Technology Organic acid |
| Zdroj: | International Journal of Environmental Analytical Chemistry. 39:257-270 |
| ISSN: | 1029-0397 0306-7319 |
| Popis: | Urban particulate matter, collected from Washington, DC and certified by the National Institute of Standards and Technology (NIST) as Standard Reference Material 1649, was extracted and fractionated into acid, base and neutral fractions. Each fraction was tested for biological activity using a microbial mutagenesis assay system. The organic acid fraction showed unexpectedly high mutagenic activity, and was subjected to chemical characterization studies. Following derivatization, analysis by GC/MS showed the presence of fatty acids, aromatic acids (including phenolic compounds), and a significant number of compounds that could not be identified from mass spectral compendia. Spectroscopic and elemental analysis data supported the characterization of the fraction as predominantly aromatic. Mass spectra from both GC/MS and direct probe analysis showed the presence of a chlorinated substance, subsequently identified as the fungicide Dichlorophen. The compound was shown to comprise over 50% of the mass... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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