The data was exported from Advion Data Express® in CSV format binned to 1 m/z, where each row included the intensity (in counts) detected for each mass unit from 30-300 Da, at every time index (roughly 0.4 seconds apart). This data was imported into Excel, and the time-averaged mass spectrum from 0 to 3 minutes was subtracted from the time-averaged mass spectrum from 3 to 14 minutes. The resultant blank-subtracted mass spectrum was then standardized against the acetone-d6 internal standard intensity for the positive ionization mode, and against the most intense peak for the negative ionization mode. This final mass spectrum was then saved and will hereafter be referred to as the sample's mass spectrum.