This International Standard specifies a gravimetric method for the determination of rare earths in magnesium alloys. The method is applicable to the determination of contents of rare earths between 0.2 and 10 %, in the absence of thorium.
GSO ISO 2355:2015 history
2015GSO ISO 2355:2015 Chemical analysis of magnesium and its alloys -- Determination of rare earths -- Gravimetric method