Liquid Chromatography Tandem Mass Spectrometry for Measuring 13C-labeling in Intermediates of the Glycolysis and Pentose Phosphate Pathway

This chapter describes a procedure to analyze ¹³ C-labeled phosphorylated compounds by liquid chromatography tandem mass spectrometry. Phosphorylated compounds, intermediaries of the glycolysis and pentose phosphate pathway, are separated by anion exchange chromatography and their isotopic labeling is determined by mass spectrometry. A sensitivity in the fmole range is achieved using scheduled multiple reaction monitoring mode.