ASTM WK45208

    Revision of D6696 - 14 Standard Guide for Understanding Cyanide Species

    (What is a Work Item?)

    Active Standard: D6696 - 14

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



    WK45208

    1. Rationale

    1) a need to identify weak acid dissociable metal cyanide complexes that are disassociated not through mildly acidic conditions but through the introduction of ligand-exchange reagents, 2) a need to remove the metal cyanide compound Hg(CN)2 from Table 2, 3) a need to clearly state that all transition metal-metal cyanide complex salts are extremely stable and generally insoluble under acidic and neutral pH conditions, 4) a need to expand the definition of Total Cyandie to include dissociation and release of free cyanide when refluxed under strongly acidic, or (strongly) alkaline conditions, 5) the need for a refined definition of available cyanide as a class of cyanide species that dissociate and release free cyanide under the action of weak acid or ligand-exchange reagents.


    Keywords

    analysis; cyanide; cyanides; environment; free cyanide; metal cyanide complex; total cyanide;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    02-25-2014

    Technical Contact:
    Daniel Desjardins

    Item:
    001

    Ballot:
    D19.06 (14-03)

    Status:
    In Balloting