Product tags
Producing Laboratory: TERC
Potassium Nitrate

IAEA-NO-3 is a dried salt (potassium nitrate, KNO3) and was prepared by A. Mariotti, Université Pierre et Marie Curie, Paris, France, between 1983 and 1985 [1, 2]. Its δ15N value is determined using data from an interlaboratory comparison [3].

δ15N+4.7air N20.2C

(N) Number of accepted laboratory means which are used to calculate the recommended or information values and their respective confidence intervals
(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)


  1. GONFIANTINI, R., Report on an advisory group meeting on stable isotope reference samples for geochemical and hydrochemical investigations, Vienna, 19 - 21 Sept. 1983. INTERNATIONAL ATOMIC ENERGY AGENCY, Vienna, Austria (1984).
  2. HUT, G., Consultants' Group Meeting on Stable Isotope Reference Samples for Geochemical and Hydrological Investigations, Vienna, Austria, 16 - 18 September 1985. Report to the Director General, INTERNATIONAL ATOMIC ENERGY AGENCY, Vienna, Austria (1987).
  3. BÖHLKE, J.K., COPLEN, T.B., Interlaboratory comparison of reference materials for nitrogen isotope ratio measurements. Proceedings of a consultants meeting held in Vienna, 1 - 3. Dec. 1993. IAEA-TECDOC-825, INTERNATIONAL ATOMIC ENERGY AGENCY, Vienna, Austria (1995) 51-66.