This is a PPG – polypropylenglycole – spectrum. The singly charged species are marked with magenta, the double charged species are violet, the triply charged molecules are green.

This is a spectrum shows the Cs/Na salt of tridecafluoroheptanoic acid. While the intention was to produce the pue Cs salt, mass spectrometric analysis shows the infux of Na contamination (green and blue lines)