International Scholarly Research Notices / 2013 / Article / Tab 1

Research Article

Microwave-Assisted Derivatization of Bile Acids for Gas Chromatography/Mass Spectrometry Determination

Table 1

Fragmentation patterns of the bile acid TMS (oximes) derivatives obtained using gas chromatography and mass spectrometry (GC/MS) and the common ions in the fragmentation patterns of cholic acid (conventional and microwave-assisted derivatization) and ursodesoxycholic acid (MAD) presented as relative intensities.

Bile acid (min) Selected fragment ions for identification and quantificationFrequent ion in fragmentation

Further abundant fragment ion, m/z m/z Relative intensity (%) microwaveRelative intensity (%) conventional

Cholic 17.19 696.5 681[M − 2TMSOH]+ = 516253100100
[M − (2TMSOH + SiCH4)]+ = 42842647.9456.74
[M − 3TMSOH]+ = 42651632.2339.61

Ursodesoxycholic 17.59 608.5 593[M − 2TMSOH]+ = 42841332
[M − (15 + 2TMSOH)]+ = 41342856

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