ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO GUIDE 35:2006 Reference materials - General and statistical principles for certification
ISO 16878:2016 history
2016ISO 16878:2016 Iron ores - Determination of metallic iron content - Iron(III) chloride titrimetric method