摘要:Hexafluoroisopropyl ester-trifluoroacetate (HFIP-TFA) derivatives or methyl estertrifluoroacetate (Me-TFA) derivatives of 18 bile acids and non-derivatized or trifluoroacetate (TFA) derivatives of 4 neutral steroids containing cholesterol and its metabolites were analyzed by capillary GC. Non-polar or slightly polar columns were effective for the analysis of HFIP-TFA derivatives of bile acids. Non-polar columns were useful for the analysis of Me-TFA derivatives of bile acids. TFA derivatives of 4 neutral steroids were completely separated and analyzed by non-polar columns. Furthermore, HFIP-TFA derivatives of 18 bile acids and TFA derivatives of 4 neutral steroids were analyzed by capillary GC/MS with electron impact (EI) or chemical ionization (CI). Molecular ions ([M]+ or [MH]+) did not occasionally appear, but the specific fragment ions ([M-CF3COOH]+ or [MH-CF3COOH]+ and so on) were observed. Intensities of the specific fragment ions were tabulated.