USGS34 , Potassium Nitrate !Out of stock!

Inorganic , Pure Substance

  • International Chemical Safety Card (ICSC): ICSC_0184

USGS34 was produced by J.K. Böhlke, S.J. Mroczkowski and T.B. Coplen, U.S. Geological Survey, Reston, USA, [1]. It was prepared from equilibrating nitric acid with δ18O depleted water and subsequent neutralisation with KOH.

Analyte Value Unit SD R/I/C
δ15N -1.8 air N2 0.2 C
δ18O -27.9 VSMOW 0.6 R

(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)


  1. BÖHLKE, J.K., MROCZKOWSKI, S.J., COPLEN, T.B., Oxygen isotopes in nitrate: new reference materials for 18O:17O:16O measurements and observations on nitrate water equilibration. Rapid Comm. Mass Spectrom. 17 (2003) 1835-1846.


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