Activity concentration measurements of ¹³⁷Cs, ⁹⁰Sr and ⁴⁰K in a wild food matrix reference material (Wild Berries) CCRI(II)-S8

Abstract

In 2009, the CCRI approved a supplementary comparison to be organized by the IRMM as pilot laboratory for the activity concentrations of 137 Cs, 90 Sr and 40 K in a matrix material of dried bilberries. The organization of this comparison and the material and measurement methods used are described. The supplementary comparison reference value (SCRV) for each of the three radionuclides are given together with the degrees of equivalence of each participating laboratory with the SCRV for the specific radionuclide. The results of this supplementary comparison allow the participating NMIs/designated institutes to declare calibration and measurement capabilities (CMCs) for the given radionuclides in a similar type of food matrix, an important aspect seen the relatively few supplementary comparisons for activity in matrix materials organized so far.

Determination of 90Sr via Cherenkov counting and modified Eichrom methods in bilberry matrix in the context of BIPM supplementary comparison

“…As a designated institute in the Association of European National Metrology Institutes (EURAMET) Ionizing Radiation Technical Committee, our laboratory participated in the supplementary comparison test (CCRI(II)-S8) organized by Bureau International des Poids et Mesures (BIPM) to demonstrate our radioactivity measurement capabilities [29]. The results of this supplementary comparison allowed our institute (TAEK) to claim calibration and measurement capabilities (CMCs) for 90 Sr, 40 K and 137 Cs radionuclides in Appendix C of the key comparison data base KCDB [30].…”