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Status : Active
Standard Type : Main
Document No : ISO 7990:1985
Document Year : 1985
Pages : 6
Edition : 1
Section Volume : Ferroalloys (ISO/TC 132.)
Method A is applicable to products having a total iron content from 1 to 25 % (m/m), and method B is applicable to products having a total iron content from 0.2 to 2 % (m/m). ISO 7990 should be read in conjunction with ISO 4297. Specifies principle, reactions (method A only), reagents, apparatus, sampling and samples, procedure and expression of results.