Water Isotopes August 2011
... Examination of the figure above shows that on passing from NTW to USGS64444 there is a small m…
Examination of the figure above shows that on passing from NTW to USGS64444 there is a small memory effect. This is on the order of 1.4% of the difference in d18O between adjacent samples in the analysis batch. For samples that are close in composition (e.g. a suite of groundwater samples from the same region) the memory effect is not important. Where samples that are widely different in composition it is advisable to run 3 or 4 samples ins sequence so that the effect can be eliminated.
18 August 2011
IAEA-TEL-2011-01 proficiency test on the determination of stable isotopes in water (H,O)
The Terrestrial Environment laboratory of the IAEA, Siebersdorf, Vienna is co-ordinating a laboratory proficiency test for the analysis of oxygen and hydrogen isotopes in water samples of unknown (to the participating laboratories) isotope composition. There are 4 waters in this test: IAEA-1 to 4. The water descriptions are: