The simultaneous determination of vitamins A, E and β-carotene in bovine milk by high performance liquid chromatography-ion trap mass spectrometry (HPLC-MSn)

► A validated LC-MS method for the analysis of vitamins A, E and beta-carotene in milk. ► Reversed phase LC and ion trap MS in positive ion APCI mode. ► Very similar results to LC-UV/Vis and LC-fluorescence methods.