ASTM D778-97(2007)

    Standard Test Methods for Hydrogen Ion Concentration (pH) of Paper Extracts (Hot-Extraction and Cold-Extraction Procedures) (Withdrawn 2010)

    Withdrawn Standard: ASTM D778-97(2007) | Developed by Subcommittee: D06.92

    WITHDRAWN, NO REPLACEMENT


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    Withdrawn Rationale:

    These test methods cover two procedures for determination of the hydrogen ion concentration, expressed in terms of pH, of an aqueous extract of paper.

    Formerly under the jurisdiction of Committee D06 on Paper and Paper Products, this test method was withdrawn in February 2010 because an equivalent TAPPI publication exists.

    1. Scope

    1.1 These test methods cover two procedures for determination of the hydrogen ion concentration, expressed in terms of pH, of an aqueous extract of paper.

    1.2 These test methods may be applied to writing, printing, and sized industrial papers.

    1.3 These test methods are not intended to be used for determination of pH of insulating papers, for that see Test Methods D 202.

    1.4 The test methods appear as follows:

    Section
    Test Method ApH of Paper (Unfiltered Extract) After
    Extraction for 1 h in Cold (25 ± 5°C) Water
    11.1
    Test Method BpH of Paper (Unfiltered Extract) After
    Extraction for 1 h in Boiling Water
    11.2

    1.5 Specifications may be based on Test Method A or Test Method B, or both.

    1.6 Where a specification or specific instructions or agreement to use only one of these test methods is absent, determine pH using both procedures, and interpret results based on Section 12.

    1.7 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 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

    D202 Test Methods for Sampling and Testing Untreated Paper Used for Electrical Insulation

    D585 Practice for Sampling and Accepting a Single Lot of Paper, Paperboard, Fiberboard, and Related Product

    D1193 Specification for Reagent Water

    D1293 Test Methods for pH of Water

    D1968 Terminology Relating to Paper and Paper Products

    E70 Test Method for pH of Aqueous Solutions With the Glass Electrode

    E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process


    Referencing This Standard

    DOI: 10.1520/D0778-97R07

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D778-97(2007), Standard Test Methods for Hydrogen Ion Concentration (pH) of Paper Extracts (Hot-Extraction and Cold-Extraction Procedures) (Withdrawn 2010), ASTM International, West Conshohocken, PA, 2007, www.astm.org

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