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Analytical Services > View by Isotope > Nitrogen

Hydrogen | Carbon | Oxygen | Sulfur

Nitrogen Isotope Analysis (15N/14N or δ15Ν)

Lady in labNitrogen isotopic compositions can be carried out on the nitrogen in a gas mixture using compound-specific isotope analysis. For groundwater, nitrate is extracted and converted into AgNO3 using ion exchange techniques. Solids and other liquids are analyzed for nitrogen characterization using an elemental analyzer interfaced with an isotope ratio mass spectrometer.



Sample Type Method Recommended
Sample Size
Nitrogen gas1 GC-IRMS 100 cc
Nitrate2 Ion Exchange 1,000 ml
Organic solids EA-IRMS 1 g
Organic liquids EA-IRMS 1 ml

1Requires GC analysis

2Includes Oxygen (180/160 or δ180) analysis




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