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  • ISO 7990:1985

    Current The latest, up-to-date edition.

    Manganese ores and concentrates Determination of total iron content Titrimetric method after reduction and sulfosalicylic acid spectrophotometric method

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English, French

    Published date:  12-12-1985

    Publisher:  International Organization for Standardization

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    Abstract - (Show below) - (Hide below)

    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.

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    Development Note Supersedes ISO R313 (04/2001)
    Document Type Standard
    Publisher International Organization for Standardization
    Status Current
    Supersedes
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