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    ASTM D1125 - 14

    Standard Test Methods for Electrical Conductivity and Resistivity of Water

    Active Standard ASTM D1125 | Developed by Subcommittee: D19.03

    Book of Standards Volume: 11.01

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    Significance and Use

    4.1 These test methods are applicable for such purposes as impurity detection and, in some cases, the quantitative measurement of ionic constituents dissolved in waters. These include dissolved electrolytes in natural and treated waters, such as boiler water, boiler feedwater, cooling water, and saline and brackish water.

    4.1.1 Their concentration may range from trace levels in pure waters (2)4 to significant levels in condensed steam (see Test Methods D2186 and D4519, and Ref (3)), or pure salt solutions.

    4.1.2 Where the principal interest in the use of conductivity methods is to determine steam purity, see Ref (4). These test methods may also be used for checking the correctness of water analyses (5).

    1. Scope

    1.1 These test methods cover the determination of the electrical conductivity and resistivity of water. The following test methods are included:




    Test Method A—Field and Routine Laboratory

    10 to 200 000

    12 to 18

     Measurement of Static (Non-Flowing) Samples



    Test Method B—Continuous In-Line Measure

    5 to 200 000

    19 to 23




    1.2 These test methods have been tested in reagent water. It is the user's responsibility to ensure the validity of these test methods for waters of untested matrices.

    1.3 For measurements below the range of these test methods, refer to Test Method D5391.

    1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.5 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

    D1066 Practice for Sampling Steam

    D1129 Terminology Relating to Water

    D1192 Guide for Equipment for Sampling Water and Steam in Closed Conduits

    D1193 Specification for Reagent Water

    D2186 Test Methods for Deposit-Forming Impurities in Steam

    D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water

    D3370 Practices for Sampling Water from Closed Conduits

    D4519 Test Method for On-Line Determination of Anions and Carbon Dioxide in High Purity Water by Cation Exchange and Degassed Cation Conductivity

    D5391 Test Method for Electrical Conductivity and Resistivity of a Flowing High Purity Water Sample

    E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids

    ICS Code

    ICS Number Code 13.060.60 (Examination of water for physical properties)

    UNSPSC Code

    UNSPSC Code

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D1125-14

    Citation Format

    ASTM D1125-14, Standard Test Methods for Electrical Conductivity and Resistivity of Water, ASTM International, West Conshohocken, PA, 2014, www.astm.org

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