Figure 6: Ion-feature totals per biochemical class or type. Pie chart is based on the 299 approved biochemicals detected in all three replicates of the Plasma B sample. 640(220) designates 640 total ion-features detected from 220 named and unknown biochemicals. Standards are isotopically labeled compounds spiked into every sample. Artifacts are defined as compounds detected in both the plasma samples and the water process blank where the plasma sample did not exceed 5x the levels seen in the blanks. Process artifacts are compounds not detected in water process blank but are known products of chemistry occurring within the extracted samples. �Other� refers to detected biologically derived ion-features/biochemicals. In Legend, percentage value is percentage of total ion-features detected.