Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Mobile phase optimization for isobaric compounds chromatography separation. The GUDCA, GHDCA, GCDCA, and GDCA have the same molecular formula, C26H43NO5 ([M − H]− m/z 448.3063), but different -OH positions. (a) 2 mM ammonium acetate in aqueous solvent; (b) 2mM ammonium acetate and 0.05% formic acid in aqueous solvent; (c) 2 mM ammonium acetate and 0.01% formic acid in aqueous solvent.
