Oxygen plasma exposure test

To determine if there is significant mass fractionation occurring during exposure of the sample to oxygen plasmas, the values of CO2 produced from successive oxygen plasmas were compared, both for internal consistency and with values of bulk material (when available). All measurements here were determined by conventional stable isotope mass spectrometry. The means and sample standard deviations (s), along with the standard errors of the means (Sm shown in parentheses) are reported in Table II. Q-tests at 95% confidence levels were performed on all measurements taken here no measurements were rejected. 

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