Figure 1

Boxplots of individual compounds’ relative standard deviation (RSD) using different cell masses (mg) and loading volumes (µL). Dashed line represents the quality assurance threshold of 15%. Five replicates were measured in each condition; outliers were removed from the final analysis as described in the materials and methods. Highlighted in green is the combination we consider the best. LC: liquid chromatography. FIA: flow injection analysis.