https://hha.hitachi-hightech.com/zh/support/consumables-coatings-xrf-calibration-standards/foil-ni-fe-(80/20)-120uin-3um
Foil Ni-Fe (80/20%) 120uin 3um
Coatings reference standard for creating or validating calibrations on XRF analyzers with spot sizes smaller than 2 mm
foilnife