Evaluation of the utility of resin acids as molecular markers for tire debris

ENVR 177

Hidetoshi Kumata, kumata@ls.toyaku.ac.jp1, Mika Mori2, Shohei Takamiya1, Tatsuya Uchida3, Mikio Tsuzuki3, and Kitao Fujiwara1. (1) Faculty of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Horinouchi 1432-1, Hachioji, Tokyo 192-0392, Japan, (2) Graduate Shool of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Horinouchi 1432-1, Hacjioji, Tokyo 192-0392, Japan, (3) Faculty of Life Sciences, Tokyo University of Pharmacy & Life Sciences, Horinouchi 1432-1, Hachioji, Tokyo 192-0392, Japan
Automobile tires wear on roads to generate tire debris (TD) with diameter of respirable size range. Various studies have repeatedly pointed out or suggested direct and adverse effects on humans of chemical components of tire tread rubber. The molecular marker would aid in assessing the relative importance of TD to air quality of urban environments. We focused on resin acids contained in the disproportionated rosin (DPR) used for the tire manufacturing process and also in tire tread rubber. Investigation of retention indices of methyl derivatives of the DPR identified the minor components to be 8-pimaren-18-oic acid (I), 8-abieten-18-oic acid (II) and 13β-abiet-8-en-18-oic acid (III). Analyses of DPR, gum-rosin, pine smoke samples, TD and environmental matrices indicated source specificity of I-III to TD. Comparing physico-chemical properties and abundances in the source (TD) of I-III with those of previously proposed TD markers, benzothiazolamines, their utilities as molecular markers for TD were evaluated.
 

Symposium Honoring Dr. Walter Giger
6:00 PM-8:00 PM, Wednesday, August 22, 2007 BCEC -- Exhibit Hall - B2, Poster

Sci-Mix
8:00 PM-10:00 PM, Monday, August 20, 2007 BCEC -- Exhibit Hall - B2, Sci-Mix

Division of Environmental Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007