This standard was last reviewed and confirmed in 2022.
Therefore this version remains current.
Abstract
PreviewMethod 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.
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Status: PublishedPublication date: 1985-12
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Edition: 1Number of pages: 6
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- ICS :
- 73.060.20 Manganese ores
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| std 2 40 | Paper |
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Life cycle
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WithdrawnISO/R 313:1963
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