ASTM WK31786

    New Test Method for Determination of Total Nitrogen by Persulfate Digestion with Nitrophenol Enrichment and Colorimetric Detection

    (What is a Work Item?)

    Developed by Subcommittee: D19.06 | Committee D19 | Contact Staff Manager


    1. Scope

    The scope and application for this standard is for natural and treated wastewater with a quantification limit of approximately 0.3 mg/L N.

    State regulatory agencies are beginning to regulate total nitrogen discharge in wastewater permits. There is no single step method or standard to determine total nitrogen. Laboratories currently have to perform a TKN and nitrate analysis, then add the two results to obtain total nitrogen. At least one state is accepting total nitrogen by persulfate digestion and colorimetric detection. A concensus-based standard is expected to be adopted the states with eventual promulgated by USEPA.


    Total Nitrogen:Nutrients

    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:

    Technical Contact:
    Cary Jackson

    Draft Under Development