https://hha.hitachi-hightech.com/en/support/consumables-coatings-xrf-calibration-standards/foil-sn-bi-(96/4)-800uin-20um-20000323
Foil Sn-Bi (96/4%) 800uin 20um
Coatings reference standard for creating or validating calibrations on XRF analyzers with spot sizes smaller than 2 mm
foilsnbi