ELEMENTAL CHARACTERIZATION OF A CANDIDATE LICHEN RESEARCH MATERIAL - IAEA-336

A lichen research material, prepared from the species Evernia prunastr i, was produced by a co-operation between the International Atomic Ene rgy Agency (IAEA) and the Institute de Ciencias e Engenharia Nucleares (INETI) in Sacavem, Portugal. An international inter-comparison study was carried out, with 42 independent sets of results being reported f rom participants in 26 countries. The statistical evaluation of the co llected data resulted in recommended values for 17 elements and inform ation values for 15 elements. The criteria for assigning the values ar e provided, including the use of information obtained through the para llel analysis of a second material, IAEA-359, Cabbage.