This standard was last reviewed and confirmed in 2022. Therefore this version remains current.
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.
Status: PublishedPublication date: 1985-12
Edition: 1Number of pages: 6
Technical Committee: ISO/TC 132 Ferroalloys
- ICS :
- 73.060.20 Manganese ores
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|std 2 40||Paper|
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Stage: 90.93 (Confirmed)
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