Measurement of intact sulfate and glucuronide phytoestrogen conjugates in human urine using isotope dilution liquid chromatography-tandem mass spectrometry with [C-13(3)]isoflavone internal standards

Clarke D. B., Lloyd A. S., Botting N. P., Oldfield M. F, Needs P. W., Wiseman H.. (2002)

Analytical Biochemistry, 309, 158-172