GC-CP Combustion / Pyrolysis Interface

• Versatility of analysis through design - user can choose to work in combustion or pyrolysis modes through having the facility to operate at temperatures up to 1200°C.

• Thermally stable gas train - while the gas control side is composed of high quality stainless steel diaphragm regulators, the reaction oven is almost entirely composed of fused silica lines to ensure that joints remain sealed during temperature gradients in the GC oven.

• Integral post-reaction gas chromatograph for separation of analyte gases prior to entering the stable isotope analyser.

• Helium interface flow prior to the reaction phase which preserves chromatography through the interface and provides the additional pressure required to drive the reaction gases through post reaction GC stage.

• Dynamic water removal by low dead-volume Nafion membrane.

• Reoxidation of the combustion chemicals is easily achieved by using the built in oxygen regeneration line connected to the helium interface flow, avoiding the need for extra valves and ‘backflushing’.

• Stand-alone multipurpose 1000°C furnace option (usually used for reducing NO_x).

• Total software control of the instrument system and data processing. Allows storage of sample analysis protocols to comply with good laboratory practice. Unique isotope ratio calculation method which removes the interference of changing backgrounds caused by column bleed. Unique data reduction technique that allows ‘intra peak’ H₃+ subtraction when measuring hydrogen isotopes. Inter-file import/export facility from instrument PC to laboratory server or internet (allows rapid updating of software or transfer to common spreadsheet packages). Fully compatible with Windows 3.1, 95 NT and XP.

• The GC-CP interface is a bench-top preparation module ready to be connected to the continuous flow interface of our 20-20 or GEO 20-20 series of isotope ratio mass spectrometers.