Instrument: Isotope-ratio Mass Spectrometer

Dataset: 
South Pacific Nitrate Isotopes
Instrument: 
Isotope-ratio Mass Spectrometer
Instrument Short Name: IR Mass Spec; IRMS
Community Standard Description
(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

These measurements are referenced to atmospheric N2 or Vienna Standard Mean Ocean Water, respectively, with analytical precision of 60.2% for nitrate 15N and 60.3% for nitrate 18O for in-house seawater-based reference material.