Progress in WICO 2011, IAEA Water Isotope Interlaboratory Comparison 
organized by the Isotope Hydrology Laboratory of Water Resources Programme

In response to our announcement, 173 laboratories have been registered to 
participate in the Fourth Interlaboratory Comparison Exercise on Stable 
Isotope Analyses (18O & 2H) of water samples. The samples along with 
covering letter and data reporting sheet have been dispatched to all the 
laboratories, which are expected to arrive soon. Electronic version of the data 
reporting sheet has been sent to each laboratory and it can also be 
downloaded <WICO2011_Reporting-Sheet.xls>. Please use this data reporting 
sheet to submit the results for each method used for analysis of the samples. 
The participants are requested to send the report electronically and also a 
hard copy to the address given below before 31st August, 2011. 


Manzoor Choudhry 
Isotope Hydrology Laboratory, 
International Atomic Energy Agency, 
P.O. Box 100, Wagramerstrasse 5, 
A-1400 Vienna, Austria; 

Phone: +43 1 2600 21758
Fax: +43 1 26007; 
Email: [log in to unmask]