Instrumentation Thermo Delta V Isotope Ratio Mass Spectrometer (IRMS) Costech ECS 4010 Elemental Analyzer (EA) Zero Blank Autosampler Thermo TRACE 1310 Gas Chromatograph (GC) ConFlo IV Universal interface for EA and GC Thermo Gas Bench II on-line gas preparation system for IRMS Piccaro G2201-i Carbon Isotope Analyzer