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. Author manuscript; available in PMC: 2019 Mar 1.
Published in final edited form as: J Am Soc Mass Spectrom. 2017 Dec 12;29(3):481–489. doi: 10.1007/s13361-017-1861-2

Figure 3.

Figure 3

a) Schematics of the reaction setup for UV-lamp induced ozonolysis coupled with infusing nanoESI. Negative ion mode MS spectra of oleic acid (FA 18:1(9Z), 5 μM, dissolved in 7:3 ACN: H2O, 0.5% formic acid added) at 500 nL/min flow rate: b) before UV irradiation and c) after 2.5 s UV irradiation. d) XIC of intact oleic ion ([M-H]−, m/z 281.4) and deprotonated 9-oxo-nonanoic acid (m/z 171.3) with the lamp manually turned on for 3 s and off for 2 s sequentially.