Separation of water-soluble vitamins has been mainly carried out using HPLC with different detectors, such as UV , fluorescence and mass spectrometry However, electrodriven methods, such as capillary zone electrophoresis (CZE) , CE-LIF and micellar electrokinetic chromatography (MEKC) have been also used for this purpose. Most of these methodologies have been employed to determine B-vitamins (and in some cases also C vitamin) in multivitamin pharmaceutical formulations and in baby and supplemented foods. However, the determination of C and B vitamins in other matrices, such as energy and sport drinks, which are complex mixtures with other additives and with a large amount of sugars have been barely explored. A planar chromatographyeESI MS method was developed for the determination of three B-vitamins (B2, B3 and B6), caffeine and taurine in 8 energy drinks, using UV detection for B3 and caffeine and also for taurine after post-chromatographic derivatization, and fluorescence for B2 and B6. However, it would be beneficial to develop a method able to quantify all these analytes simultaneously by one detection method. In this way, have developed a surfactant-mediated matrixassisted laser desorption/ionization method for the simultaneous analysis of B2, B3 and B6 vitamins and caffeine in 4 energy drinks, while have developed an hydrophilic interaction liquid chromatography (HPLC) method using an endcapped HILIC-diol column for the separation of C and seven B-vitamins in a pharmaceutical formulation and in an energy drink. However, there is still a need of a simple, less expensive techniques and rapid screening method for the determination of both B and C vitamins for quality control purposes in complex matrices, able to eliminate other matrix interferences.