Spectra of ESI–MS of 100 μM solution of catechol in H2O at pH 8

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Spectra of ESI–MS of 100 μM solution of catechol in H2O at pH 8 Spectra of ESI–MS of 100 μM solution of catechol in H2O at pH 8.0 exposed to a 0.200 L min–1 flow of (A) 1 atm N2(g) (bottom purple trace), (B) 40 ppbv O3(g) (center blue trace), and (C) 3.08 ppmv O3(g) in H2O (top yellow trace). Ion count values are normalized percentages relative to I109, the most intense peak in the mass spectrum, and the scale only shows signals up to 18%. Published in: Elizabeth A. Pillar; Robert C. Camm; Marcelo I. Guzman; Environ. Sci. Technol. 2014, 48, 14352-14360. DOI: 10.1021/es504094x Copyright © 2014 American Chemical Society