Fig. 7
From: Picky with peakpicking: assessing chromatographic peak quality with simple metrics in metabolomics
Randomly selected ion chromatograms from both “Good” (top row) and “Bad” (bottom row) manual classifications. Plots show retention time along the x-axis in a 1-min window around the center of the feature and show measured intensity on the y. Features are from the MESOSCOPE dataset and colored by the depth from which the biological sample was taken. DCM = deep chlorophyll maximum, approximately 110 m. Mass feature identifications are provided as the title of each panel, starting with “FT” and followed by 4 digits except for the two features annotated using authentic standards run alongside: the 13C isotope of dimethylsulfonioacetate (DMS-Ac) and taurine