The IMEV spectrochemical and isotopic analysis platform aims to meet the needs expressed by scientific communauty either for scientific collaboration, or as an analysis facility, with several instruments:- GC-MS : an Agilent 7890 gas chromatograph coupled to an Agilent 5975C single quadrupole filter mass spectrometer.- EA-IRMS : Isoprime 100 continuous flow isotopic ratio mass spectrometer coupled to an Elementar Vario Pyrocube elementary analyzer, for the measurement of delta13C, delta15N, %C and %N.- The GC-MS is also coupled to the IRMS via an Isoprime GC5 combustion interface for the measurement of the specific isotopic ratio of the compounds separated by GC and detected by MS.- a LC-MS/MS being acquired.