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Logic Puzzle #31: Are the Signals Related?

Sorting out what compounds are present in a mixture is a difficult task. The process is further complicated when the compounds co-elute on a chromatographic run.

An LC/MS (ESI+) was collected for an unknown sample comprising of small organic molecules. The total ion chromatogram (TIC shown in black) shows a signal at 2.86 minutes. The extracted ion chromatograms (XICs) for m/z 188.1 (red) and 205.1 (green) appear at 2.86 minutes. Are the signals related to the same component? Or is co-elution occurring?