XRF Analysis of Certified Standards Example
The links below open to tables showing the % composition found by the alpha-2000 XRF instrument versus the reported values for certified reference alloys of known composition. The areas shaded in light blue in the tables are the heavy (detectable) elements explicitly required or allowed for the UNS (Unified Number System) grade according to SAE International. The tables compare values reported by the instrument (“found” column), versus those in the certificate of analysis of the standard (“certified” column). Examples are given of the instrument output as a function of acquisition time, illustrating the tradeoff between fast alloy id and maximal sensitivity for trace elements.
Typically, the %wt composition of the major alloying element in each case was found to be within ~1-2% of the actual value for the standards
UNS-C48200, Naval Brass, Medium-Leaded, CDA 482
UNS-C93200, Cast High-Leaded Tin Bronze, SAE 660
UNS-G10180, Carbon Steel, 1018
UNS-S30400, Austenitic Cr-Ni Stainless Steel (304)
UNS-T11302, High-Speed Tool Steel (M2)
UNS-R30035, Co-Ni-Cr-Mo Alloy (MP-35-N) 
UNS-R58640, Titanium Alloy Beta C (Grade 19)