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In this study, 20\u2003\u03bcL aliquots of fresh gasoline samples were intentionally weathered and also subjected to microbial degradation in potting soil. These samples were then analyzed using a passive adsorption\u2013elution recovery method and gas chromatography\/mass spectrometry. Peak areas from compounds of interest were normalized and autoscaled and then subjected to principal components analysis. This analysis showed that while lower boiling compounds are subject to weathering, a different set of compounds are subject to microbial degradation. Of the compounds studied, heptane, octane, toluene, and ethylbenzene were the most vulnerable to both weathering and microbial degradation. In contrast, 1,3,5\u2010trimethylbenzene and 2\u2010ethyltoluene were the most resistant to both phenomena.<\/jats:p>","DOI":"10.1111\/j.1556-4029.2011.01989.x","type":"journal-article","created":{"date-parts":[[2011,12,8]],"date-time":"2011-12-08T16:58:10Z","timestamp":1323363490000},"page":"64-69","source":"Crossref","is-referenced-by-count":45,"title":["Comparing the Effects of Weathering and Microbial Degradation on Gasoline Using Principal Components Analysis*"],"prefix":"10.1111","volume":"57","author":[{"given":"Dee A.","family":"Turner","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John 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