Integrated QMS signals normalized to the integrated QMS signals of the CH3 O.+, CHO.+, and 13 CHO.+ ions from the CH3OH (exp. 3.0), CH4 + H + 18O2 (exp. 2.2), and 13CH4 + H + 18O2 (exp. 2.3) experiments, respectively. Ratios of the integrated intensities between the isotopes are in agreement with each other and with NIST values representing CH3 OH.
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