Reference number
ISO 7990:1985
© ISO 2024
International Standard
ISO 7990:1985
Manganese ores and concentrates — Determination of total iron content — Titrimetric method after reduction and sulfosalicylic acid spectrophotometric method
Edition 1
1985-12
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Published (Edition 1, 1985)
This publication was last reviewed and confirmed in 2022. Therefore this version remains current.

ISO 7990:1985

Language
Format
CHF 42
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Abstract

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

  • Status
     : Published
    Publication date
     : 1985-12
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 1
    Number of pages
     : 6
  • Technical Committee :
    ISO/TC 132
    ICS :
    73.060.20 
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