Alliages de magnésium — Dosage du zirconium insoluble — Méthode photométrique à l'alizarine sulfonate

The method is applicable to alloys having insoluble zirconium contents between 0,02 and 0,3 %. Rare earths, thorium and silver do not interfere. Specifies principle and procedure of the method, reagents, apparatus, sampling, expression of results and test report.