Calibration mixtures were prepared
using lipid, small molecule, and polyalanine standards. The lipid
mixture was prepared in MeOH, 0.1% FA. The polyalanine mixture was
prepared in 1:1 MeOH/H2O, 0.1% FA. A combined lipid, small
molecule, and polyalanine mixture was also prepared in 1:1 MeOH/H2O, 0.1% FA. The individual lipid and polyalanine mixtures
along with the small molecules from the combined mixture were used
for the calibration seen in this manuscript. The combined mixture
as a whole was used for demonstration purposes. The final concentrations
for the standards can be found in Supporting Information Document 1, Table S2. A 10× dilution of SPLASH Lipidomix
was prepared by adding 10 μL of the mixture, as obtained from
the vendor, to 90 μL of MeOH.
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