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INTER-LABORATORY COMPARISONS COMPLETED

TRIC2004 Seventh Inter-laboratory Comparison Exercise of Tritium Analysis of Water at Environmental Activity Levels

WICO2002 Water Isotope Inter-laboratory Comparison

This exercise was started in 2002 Four water samples with carefully calibrated isotopic composition were sent out to 95 laboratories. 82 laboratories from 31 countries reported data back to the IAEA.

In addition, two soil samples (equilibrated with water of known isotopic composition) were sent to 24 laboratories, from which 14 laboratories reported back data.

For the four samples of the water exercise, the reference values are given below as calibrated at the IAEA with three independent mass spectrometers and sample preparation systems:

Sample code

δ¹⁸O_VSMOW[‰] ± uncert; (no.)

δ²H_VSMOW[‰] ± uncert; (no.)

OH-5

-0.199±0.034 (n=82)

-1.73±0.59 (n=81)

OH-6

-4.159±0.028 (n=79)

-38.65±0.42 (n=80)

OH-7

-10.646±0.032 (n=85)

-77.63±0.58 (n=49)

OH-8

-16.204±0.036 (n=88)

-121.52±0.45 (n=52)

The final report for water samples (1,976kB / 1,774kB) for download.

For your convenience you may have a look at:
The registration announcement (13kB / 7kB) for download

Part I REPORTING SHEET– WATER SAMPLES (57kB) for download

Part II REPORTING SHEET– SOIL WATER (53kB) for download

Boron stable isotope inter-laboratory comparison exercise
This exercise was started in spring 2000, organized by the University of Pisa in cooperation with the IAEA. The report was submitted to Geostandards Newsletters in March 2002.
Tritium Interlaboratory Comparison TRIC2000
Half-life annex to the intercomparison providing information on the newly determined tritium half-life and its implications for future tritium work.
Stable Isotope Interlaboratory Comparison 1999
Chemistry Interlaboratory Comparison 1999
IC-StableIsotopes2IAEA-1995-Araguas-Rozanski
IC-StableIsotopesEnriched-NAHRES-5_IAEA-1991-Parr-Clements
IC-Tritium2_IAEA-1970-Florkowski-Payne-Sauzay
IC-Tritium4_IAEA-1986-Hut
IC-Tritium5_IAEA-1995-Oestlund-Scott-Taylor

You can READ the documents if your browser has an Adobe PDF plugin or DOWNLOAD the PDF format.
Acrobat Reader for download

Sample code	δ¹⁸O_VSMOW[‰] ± uncert; (no.)	δ²H_VSMOW[‰] ± uncert; (no.)
OH-5	-0.199±0.034 (n=82)	-1.73±0.59 (n=81)
OH-6	-4.159±0.028 (n=79)	-38.65±0.42 (n=80)
OH-7	-10.646±0.032 (n=85)	-77.63±0.58 (n=49)
OH-8	-16.204±0.036 (n=88)	-121.52±0.45 (n=52)