ASTM-D3872 Standard Test Method for Ferrous Iron in Iron Oxides

ASTM-D3872 - 2005 R19 EDITION - CURRENT
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Standard Test Method for Ferrous Iron in Iron Oxides
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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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Significance and Use

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

Keywords

ferrous iron content; iron oxides; pigment;; ICS Number Code 71.060.20 (Oxides); 77.080.10 (Irons)

To find similar documents by ASTM Volume:

06.03 (Paint -- Pigments, Drying Oils, Polymers, Resins, Naval Stores, Cellulosic Esters, and Ink Vehicles)

To find similar documents by classification:

71.060.20 (Oxides Including dioxides, peroxides, etc.)

77.080.10 (Irons)

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Document Number

ASTM-D3872-05(2019)

Revision Level

2005 R19 EDITION

Status

Current

Modification Type

Reapproval

Publication Date

May 1, 2019

Document Type

Test Method

Page Count

3 pages

Committee Number

D01.31