The GEO dual-inlet gas isotope ratio mass spectrometer provides the ultimate precision and sensitivity in stable isotope measurement of a wide range of gases.

High precision analysis combined with a range of sample preparation modules gives the GEO the flexibility to adapt to a wide range of applications. These include geochemistry, hydrology, environmental, marine and biological sciences; in fact any application where ultimate IRMS performance is a necessity.

The instrument is designed to the highest specification and combines state of the art technology with moderate cost. It can be used in dual-inlet and continuous-flow modes with a variety of optional add-on accessories and sample preparation systems. The GEO couples the unrivalled ultra-low dead volume Pentabloc dual-inlet system, the PENTA, with the well known and proven 20-22 mass spectrometer. The exceptional 120° extended geometry ion optics of the 20-22 analyser provides high dispersion over a short path length and near 100% transmission, giving large instrument performance in a small package.

The GEO is compatible with all of the Sercon’s continuous flow preparation systems and is the most comprehensive and flexible instrument available for high precision IRMS.

using a two-module arrangement it allows the upgrading of an existing Sercon 20-22 Continuous Flow Mass Spectrometer to the GEO Dual Inlet IRMS System.

The key features of the GEO 20-22:

• D/H, ¹³C/¹²C, ¹⁵N/¹⁴N, ¹⁸O/¹⁶O and ³⁴S/³²S precision measurement
• PentaBloc ultra-low dead volume dual-inlet system with automatic cold finger
• Inlet valves are of the normally-closed type for fail-safe operation
• Extended geometry of 21 cm effective radius
• High transmission from true stigmatic focusing for all gases (including both H₂ collector options)
• Very high focusing stability from 120° optics
• Truly universal Faraday triple collectors for flexibility
• Compatible with all continuous-flow sample preparation systems

| Sample Preparation Systems |