The Waters SELECT SERIES MRT System is now compatible with UPLC-MS with an available electrospray ionisation (ESI) source. Coupling the high resolution MRT System with the ESI source enables scientists to accurately resolve and measure low (<200 ppb) concentrations of sample analytes at UPLC acquisition speeds for metabolomics, metabolite identification or peptide mapping applications. The performance of the SELECT SERIES MRT allows scientists to get the highest quality mass spectrometry data and information faster than any commercial mass spectrometer on the market today, giving scientists a much clearer picture of the structure of their molecules at the isotope level.