ASTM D3872 - 05(2011)

    Standard Test Method for Ferrous Iron in Iron Oxides

    Active Standard ASTM D3872 | Developed by Subcommittee: D01.31

    Book of Standards Volume: 06.03


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    Significance and Use

    This test method may be used for production quality control or specification acceptance.

    1. Scope

    1.1 This test method covers the quantitative determination of ferrous oxide (FeO) by oxidation of ferrous iron (Fe++) in an acid solution to the ferric state (Fe+++) and titration with potassium dichromate using diphenylamine as the indicator.

    1.2 This test method is applicable to synthetic black iron oxide, natural black iron oxide, magnetite or brown iron oxide where part of the iron content is present in the ferrous state (Note 1). It is applicable to iron oxides where the ferrous iron content ranges from 50 to 0.20 %.

    Note 1—Natural iron oxides and magnetite may contain traces of metallic iron that will be combined with and analyzed as FeO.

    1.3 This standard does not purport to address the safety concerns if any, problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D50 Test Methods for Chemical Analysis of Yellow, Orange, Red, and Brown Pigments Containing Iron and Manganese

    D280 Test Methods for Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigments

    D769 Specification for Black Synthetic Iron Oxide

    D1193 Specification for Reagent Water

    D3722 Specification for Natural Red and Brown Iron Oxide Pigments

    D3724 Specification for Synthetic Brown Iron Oxide Pigment


    UNSPSC Code

    UNSPSC Code 12352303(Inorganic oxides); 31211503(Pigment paints)


    Referencing This Standard

    DOI: 10.1520/D3872-05R11

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D3872-05(2011), Standard Test Method for Ferrous Iron in Iron Oxides, ASTM International, West Conshohocken, PA, 2011, www.astm.org

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