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- W2335347910 abstract "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." @default.
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- W2335347910 date "1990-01-01" @default.
- W2335347910 modified "2023-09-26" @default.
- W2335347910 title "Capillary GC and GC/MS properties of HFIP-TFA derivatives of 18 bile acids and TFA derivatives of 4 neutral steroids." @default.
- W2335347910 doi "https://doi.org/10.1248/jhs1956.36.437" @default.
- W2335347910 hasPublicationYear "1990" @default.
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