Fig. 3From: Reproducible untargeted metabolomics workflow for exhaustive MS2 data acquisition of MS1 featuresFeatures linked between positive and negative by PMD 2.02 Da within a retention time shift of 10 s for positive and negative mode ionization. The red and blue circles represent positive and negative ions, respectively. Compounds with confirmed identities based on MS/MS annotation to GNPS are colored in blackBack to article page