Determination by pyrolysis-gas chromatography of the phenolic resin concentration in particulate matter accumulated from traffic on roads
✍ Scribed by Takashi Saito
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 640 KB
- Volume
- 276
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
A simple and rapid method for determining the phenolic resin concentration in particulate matter accumulated on roads due to traffic was investigated. The phenolic resin concentration may provide an indirect estimate of the concentration of asbestos because both compounds originate from brake friction materials of automobiles. After extracting the particulate matter with tetrahydrofuran, the extract was analysed with a gas chromatograph to which a Curie-point pyrolyser was attached. The phenolic resin concentrations in the particulate matter were measured by determining the amount of phenol generated by pyrolysis of the polymer. An estimate of the asbestos concentration can then be obtained based on the known contents of phenolic resin and asbestos in brake friction materials of automobiles. It was estimated that the asbestos particle concentration originating from brake friction materials of automobiles was in the range of 0.753-2.19 mg g-i for particulate matter accumulated on roads in Tokyo.