Specifications of the Integra CN :

• Design Integrated bench-top unit of a mass analyser and Dumas combustion unit with vertical mounted furnaces. Built in pressure and flow sensors, isothermal GC and software controlled variable oxygen input.
• Analytical Mode Samples in capsules are converted to N₂, and CO₂ by combustion and measured by the integrated isotope ratio mass spectrometer.
• Ion source High sensitivity, electron impact, plug-in design.
• Magnet Permanent.
• Resolution = 95 (N₂) 10% valley definition.
• Sensitivity < 1500 molecules per mass 44 ion.
• Abundance Sensitivity < 300 ppm for CO₂ at 4 x 10-6 mbar in continuous flow mode. (Software function allows calibration to zero to ensure accuracy.)
• Linearity Changing from 100 to 1500 µg C will effect a change of <0.2‰.
• Vacuum Turbomolecular pump (70 L/s) backed by a two-stage rotary pump. Ultimate vacuum of 1 x 10-8 mbar. Source pressure monitored by active gauge.
• Inlet Built-in capillary inlet with fail-safe pneumatic valve.
• Water Removal Re-chargeable magnesium perchlorate trap.
• CO2 Removal Re-chargeable Carbosorb trap. Software selectable.
• Gas Control High quality stainless steel diaphragm regulators. Gas flow rates controlled by crimps. Software controlled oxygen pulse for efficient and economical combustions. A software controlled flow diverter valve selects the GC effluent to go to the mass spectrometer or to waste. Normally closed solenoid valves to prevent gas wastage during laboratory power cuts.
• Sample Range Solids/Liquids:- 5 to 1000 µg N, 5 to 2000 µg C. (NB. samples down to 0.5 µg can be measured with reduced precision).
• Analytical Cycle 4 min per sample (¹⁵N only)
  7 min per sample (¹⁵N and ¹³C)
• Autosampler 66 position pneumatic autosampler that takes (standard) capsules with dimensions up to 12 x 6mm. Software controlled. Extra carousel (to allow up to 130 samples) or large hole version available as options.
• Data acquisition Data acquisition system uses state of the art highly stable and linear high frequency converters which produce integral slices with zero dead time and quantisation below the beam statistical noise floor at all signal levels.
• Software Proprietary operational software for system control and data handling. Fully compatible with Windows 3.1, ‘95’ and NT.
• Electronics Flashover resistant source electronics. Full control and monitoring of all instrument parameters through software and on-board micro-processors.
• Dimensions 770mm wide, 520mm deep, 555mm high.

A Nitrogen only version of the Integra is also available.

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