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GISP (Greenland Ice Sheet Precipitation) was prepared by W. Dansgaard, University of Copenhagen, from a sample of Greenland snow [1]. The GISP δ-values are based on the VSMOW-SLAP scale. They are statistically evaluated results of data from three interlaboratory comparisons [2, 3, 4]. GISP is intended for control of the successful calibration of internal laboratory standards realized by use of VSMOW2 and SLAP2 samples.

δ2H-189.51.2 75C

(N) Number of accepted laboratory means which are used to calculate the recommended values. (SD) Standard uncertainties at 1 sigma. 
(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)


  1. HUT, G., Consultants' Group Meeting on Stable Isotope Reference Samples for Geochemical and Hydrological Investigations, IAEA, Vienna, 16 - 18 September 1985; report to the Director General. International Atomic Energy Agency, Vienna (1987).
  2. GONFIANTINI, R., Advisory group meeting on stable isotope reference samples for geochemical and hydrochemical investigations, IAEA, Vienna, 19-21 September 1983. Report to the Director General. International Atomic Energy Agency, Vienna (1984).
  3. ARAGUAS-ARAGUAS, L., ROZANSKI, K., Interlaboratory comparison for deuterium and oxygen-18 analysis of precipitation samples. Report, International Atomic Energy Agency, Vienna (1995).
  4. KOZIET, J., PICHLMAYER, F., ROSSMANN, A., Carbon, oxygen and hydrogen isotopic intercomparison of fruit and vegetable juices. IAEA TECDOC-825, International Atomic Energy Agency, Vienna (1995) 75-80.

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