ASTM WK57556

    New Test Method for Total Hardness of Water, Waste Water with Color Using Titration and Optical Spectroscopy as End Point Determination

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    Developed by Subcommittee: D19.05 | Committee D19 | Contact Staff Manager



    WK57556

    1. Scope

    1.1 This test method covers the determination of hardness in water by titration with potentiometric detection via optical sensor. This test method is applicable to waters that are free of chemicals that will complex calcium or magnesium. The lower detection limit of this test method is approximately 2 to 5 mg/L as CaCO3; the upper limit can be extended to all concentrations by sample dilution. It is possible to differentiate between hardness caused by calcium ions and that caused by magnesium ions by this test method. 1.2 This test method is applicable to both colorless and colored water samples including groundwater, surface water, wastewater, and drinking water. 1.3 Units--The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.4 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.


    Keywords

    analysis; calcium carbonate hardness; hardness; titration; water; optical sensor; autotitrator

    The title and scope are in draft form and are under development within this ASTM Committee.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    01-27-2017

    Technical Contact:
    Jay Gandhi

    Status:
    Draft Under Development