Journal of Lipid Research, Vol 26, 1009-1011, Copyright © 1985 by Lipid Research, Inc.
Glyco-7 alpha, 12 alpha-dihydroxy-5 beta-cholanic acid as internal standard for high-pressure liquid chromatographic analysis of conjugated bile acids
M Muraca and Y Ghoos
Glyco-7 alpha, 12 alpha-dihydroxy-5 beta-cholanic acid was tested as
internal standard for high-pressure liquid chromatographic analysis of the
five main glycine- and taurine-conjugated bile acids present in adult human
serum and bile. When the standard is added to the samples before
extraction, the recovery rate throughout the procedure is similar to that
of other bile acids. For all bile acids studied, the response, relative to
the internal standard, is linear at 205 nm. Baseline separation is observed
between the internal standard and all other bile acids, both in artificial
mixtures and extracts of biological samples. Thus, glyco-7 alpha, 12
alpha-dihydroxy-5 beta- cholanic acid is a reliable internal standard for
HPLC analysis of conjugated bile acids in serum and bile.