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Consensus Mass Spectra for PFOA using sum normalized intensity (A), max normalized intensity (B), and an expanded view of a single ion in the sum normalized intensity (inset in A). The black lines and circles represent the mean m/z and intensity pair. Red error bars represent the standard deviation about the m/z value (x-axis) and the normalized intensity value (y-axis). Sum normalization was used for the rest of this study.
