School of GeoSciences

Instrument Specifications

The Stable Isotope Ratio Mass Spectrometers


spectrometer sample
Spectrometer cooling

The Wolfson Lab contains two stable isotope ratio mass spectrometers. The first, a VG PRISMIII with a dual inlet system and an ISOCARB preparation system used to analyse samples for stable carbon and oxygen isotopes. This system routinely runs samples from 150 µg upwards in size. Secondly, a THERMO ELECTRON DELTA+ ADVANTAGE with dual inlet and a KIEL CARBONATE III preparation system. This system will run samples as small as 30 µg in size.

Elemental Analyser


The Wolfson Lab also houses a CE INSTRUMENTS NA2500 ELEMENTAL ANALYSER which can be interfaced with either of the mass spectrometers via dual reference gas injector boxes with additional diluters. This provides the capability to analyse organic samples for stable nitrogen and carbon isotope ratios, the diluter making it possible to obtain nitrogen and carbon data simultaneously.