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ISO 1178:1976 Magnesium alloys - Determination of soluble zirconium - Alizarin sulphonate photometric method
standard by International Organization for Standardization, 03/01/1976
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The method is applicable to alloys having zirconium contents between 0,1 and 1,0 % (m/m). However the method is not applicable completely to alloys having lead and/or bismuth (see annex). Rare earths, thorium and silver do not interfere. Specifies principle and procedure of the method, the reagents, apparatus, sampling, expression of results and test report.