Instrument: Isotope-ratio Mass Spectrometer

Dataset: 
Instrument Short Name: IR Mass Spec; IRMS
(http://vocab.nerc.ac.uk/collection/L05/current/LAB16/)
Instrument Description:

The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).

PI supplied instrument name: Isotope-ratio Mass Spectrometer
Dataset-specific description

An isotope ratio mass spectrometer was used to measure the 18/16 ratio of the dissolved O2.