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Mobility spectra collected when TW were generated in MIPS mode (blue) and MFT mode (red). The spectra on the top (a) are misaligned due to variations in TW amplitude which, once corrected for, produce the spectra on the bottom (b). The injection width used when collecting the presented spectra was 1 ms, with the exception of the spectra labeled “MIPS (200 μs Inj. Width).” Peaks at (approximately) 10, 27, and 45 ms correspond to morphine, T8, and T12, respectively.
