This European Standard specifies a procedure on how to improve the performance of a routine XRF method, already in use for analysis of high alloy steels, by using a ""near by technique"".The ""near by technique"" requires at least one target sample (preferable a CRM) of a similar composition as the unknown sample.The method is applicable to elements within the concentration ranges according to Table 1:Table 1 - Concentration rangesElement Concentration range, % (m/m) aSi 0,05 to 1,5Mn 0,05 to 5,0P 0,005 to 0,035Cr 10 to 25Ni 0,1 to 30Mo 0,1 to 6,5Cu 0,02 to 1,5Co 0,015 to 0,30V 0,015 to 0,15Ti 0,015 to 0,50Nb 0,05 to 1,0a The concentration ranges specified,