rt-m/z plot of cluster 5. Scatter plot in the rt-m/z plane for identification of adducts and unknown marker candidates. Marker candidates associated with prototype 5 are prepresented as big red dots in the retention time vs. mass-to-charge ratio (rt-m/z) plane. The wound markers represented by the big blue dots are JA (m/z 209, rt 0.72 min) and OPC-4 (formate adduct, m/z 283, rt 0.98 min). The marker candidates that are in a vertical line with the blue dot at rt 0.72 min exhibit a noticeable vertical stack. The remaining marker candidates of the experiment are represented by small black dots. The average intensity profile associated with prototype 5 is shown on the right hand side.