The plateform Biogeochemical Flows and Stable Isotopes of the Montpellier European Ecotron (Isoflux), is a gas analysis platform whose operation is transverse to the three Macrocosm, Mesocosm and Microcosm experimental platforms. It allows the acquisition of on-line and continuous measurements, when coupled to an experimental platform, as well as independant measurements when sampling is carried out on flanges or exetainer.
The platform is accessible either through the service offered by one of the experimental platforms,, or directly within the famework of a collaboration or a service.
Our IsoFlux platform also offers the opportunity to measure stable carbon isotopes (12C, 13C), nitrogen (14N, 15N), oxygen (16O, 17O et 18O) and hydrogen (1H, 2H) on gaseous and liquid matrices in order to study in greater detail the ecophysiological or physico-chemical mechanisms involved in an ecosystem. Measurements can either be carried out continuously and coupled with trace gas flow measurements, or carried out on samples (flask, exetainer, liquid water). For this purpose we are equipped with several laser isotope analysers (Aerodyne, Picarro), as well as a Delta V Plus isotope ratio mass spectrometer (IRMS) (ThermoElectron) equipped with a Gasbench, a Dual Inlet and a special set of collectors (air-ratio). We are also able to implement isotope labelling (steady-state or pulse labelling) to trace the flow of elements during experiments taking place on our three experimental platforms.