ASTM D6851 - 02(2011)

    Standard Test Method for Determination of Contact pH with Activated Carbon

    Active Standard ASTM D6851 | Developed by Subcommittee: D28.02

    Book of Standards Volume: 15.01


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    Significance and Use

    The determination of contact pH can be used as a simple and fast measurement that can allow activated carbon producers and users to have a standard method for assessing the effect various carbons will have on the initial pH of the water in contact with the carbon. It has been determined that there is a bias between this method and Test Method D3838; they are not equivalent.

    1. Scope

    1.1 This method is to be used in the determination of the pH of water on initial contact with activated carbon. This test method is not meant as a replacement for Test Method D3838 and may give a different value.

    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 and health practices and to 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

    D1193 Specification for Reagent Water

    D1293 Test Methods for pH of Water

    D3838 Test Method for pH of Activated Carbon

    E300 Practice for Sampling Industrial Chemicals


    ICS Code

    ICS Number Code 71.040.30 (Chemical reagents)

    UNSPSC Code

    UNSPSC Code 11101522(Activated carbon)


    DOI: 10.1520/D6851-02R11

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