SEARCH Articles Figures Tables High performance liquid chromatography/atmospheric pressure ionization-mass spectrometry High performance liquid chromatography/atmospheric pressure ionization-tandem mass spectrometry Ionization method for liquid chromatography mass spectrometry Liquid chromatography atmospheric pressure ionization mass spectrometry Liquid chromatography electrospray ionization mass Liquid chromatography electrospray ionization mass bile acid analysis Liquid chromatography electrospray ionization mass spectrometry Liquid chromatography-electrospray ionization-tandem mass Liquid chromatography-mass Liquid chromatography-mass ionization methods Liquid chromatography-mass ionization modes Liquid chromatography-mass spectrometry atmospheric-pressure ionization techniques Normalized liquid chromatography nanospray ionization mass