CryoPrep Specifications:

• Design Bench top module containing cryo-trapping interface and oxidation furnace on ‘swing out’ plate to enable easy changing of combustion tube. GC columns housed in isothermal gas chromatograph.
• Analytical Mode Gas samples are flushed by helium from septum sealed bottles and purified by a user defined combination of gas chromatography, combustion, cryo-trapping and cryo-focusing.
• Gas Chromatography Dual selectable GC columns which include megabore capillary columns comprising of a Poraplot-Q and Molsieve PLOT columns to cover many gas analysis methods.
• Cryo-focusing Stage Cryo-trapping and focus device (3 automated cryo units) which is capable of trapping and purifying condensable gases such as N₂O, CO₂ and NO.
• Sub-sampling valve Valve to allow samples in the 1 ml range to be analysed as well as trace gases. Example applications are N₂ and O₂ analysis or N₂/Ar ratio analysis.
• Oxidation stage Ceramic capillary tube packed with oxidising chemicals for combustion of CH₄ to CO₂. Close fitting conversion reactor with the facility to maintain a temperature of up to 1200°C.
• Isothermal GC Separate fan assisted oven with digital temperature controller. Temperature range: ambient to 250°C (0.3°C accuracy, 2°C uniformity).
• Gas Control High quality stainless steel diaphragm regulators.
• Reference System Isotope ratios are calibrated by a reference gas injection system that pulses a relevant bottle gas into the mass spectrometer or against internal standards of air placed in the autosampler rack.
• Software The software takes care of system operation (source ionization, IRMS data collection, peak scanning, flow diversion control) and data processing & reporting (isotope ratio reduction, peak detection).
• Autosampler A modified Gilson 222 autosampler has been designed for batch analyses of air samples. Sample trays to accommodate 12 ml, 30ml, 60ml, 125ml or 250ml bottles are provided.

| Cryoprep | Isotope Ratio Mass Spectrometers |