| Target group: | Laboratories interested in the analysis of natural and artificial radionuclides |
| Matrices: | Moss mixed with soil and spiked water. |
| Samples: | Participants will receive one moss-soil sample (100 grams) and 3 spiked water sample 500 ml each. |
| Analytes (tentative) For gamma emitting radionuclides the design of the proficiency test will be such that the participants will be asked to analyse the moss-soil and water samples for the following radionuclides: K-40, Co-60, Zn-65, Cs-134, Cs-137, Cd-109, Ba-133, Ce-144, Eu-155, Pb-210, Ra-226, Ac-228, Th-234 and Am-241. It should be noted that only some of the listed radionuclides will be present in the samples. The levels of the radionuclides are such that they can be measured within a 12 hour measurement period using a conventional HPGe gamma spectrometer of 35% relative efficiency. For radiochemical analysis the participants will be asked to analyse the moss-soil sample only for the following radionuclides Sr-90, Po-210, Th-232, U-234, U-238, Pu-238, Pu-239+240 and Am-24 | |
| Activity level: | Below 1000 Bq kg-1 for each of the radionuclides in moss-soil and below 100 Bq kg-1 total activity for spiked water. |
| 15 June 2009 | Opening date for on-line application. |
| 31 July 2009 | Closing date for on-line application |
| 1 September 2008 | Organiser confirmation of the participation in the PT |
| 15 October 2009 | Shipment of the samples |
| 15 February 2010 | Results submission deadline |
| 15 March 2010 | Individual evaluation reports |
| October 2010 | Summary report |
| February 2011 | Participants meeting for presenting the PTsummary report |