ASTM D6647-26

1.1 This test method covers the determination of acid-soluble iron content in granular and powdered activated carbons using suitable analytical equipment. This test method involves extracting the iron with hydrochloric acid and quantifying it through analytical techniques appropriate for the selected equipment. This test method does not determine the total iron concentration of a sample.

1.2 This standard does not purport to address all of the safety concerns, if any, 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. For a specific hazard statement, see Section 8.

1.3 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.

5.1 This test method is significant for applications where iron leaching may affect product quality, such as in food, chemical purification, or decolorization processes.

5.2 Users should validate equipment performance, ensuring no interferences from other sample matrix components.

5.3 Ensure materials in contact with the sample or solutions (for example, glass, ceramics, or plastic) do not introduce iron contamination.