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ISO 7990:1985 Preview
Manganese ores and concentrates -- Determination of total iron content -- Titrimetric method after reduction and sulfosalicylic acid spectrophotometric method
This standard was last reviewed and confirmed in 2016. 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.
General information
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Status : PublishedPublication date : 1985-12
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Edition : 1Number of pages : 6
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- ICS :
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Manganese ores
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Life cycle
A standard is reviewed every 5 years
Revisions / Corrigenda
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Previously
ISO/R 313:1963
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Now confirmed
ISO 7990:1985
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