ASTM WK36121

    Work Item: ASTM WK36121 - New Test Method for Determination of p-Toluic Acid and 4-Carboxybenzaldehyde in Purified Terephthalic Acid by High Performance Liquid Chromatography

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    Developed by Subcommittee: D16.02 | Committee D16 | Contact Staff Manager



    1. Scope

    This test method covers the determination of the 4-carboxybenzaldehyde (4-CBA) and p-Toluic acid (p-TOL) in purified terephthalic acid (PTA) for industrial use by high performance liquid chromatography (HPLC). Purified terephthalic acid containing 4-carboxybenzaldehyde and p-Toluic acid at concentrations above 3 mg/kg and 10 mg/kg respectively can be detected by this test method.

    The presence of 4-CBA and P-Tol in PTA product needs to be well controlled, since the two impurities may affect the poly-condensation of terephthalic acid and ethylene glycol. The HPLC method will be adopted by PTA producers, consumers for quality control and trade.


    Keywords

    purified terephthalic acid (PTA);4-carboxybenzaldehyde (4-CBA); p-Toluic acid (p-TOL);high performance liquid chromatography (HPLC)

    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:
    01-23-2012

    Technical Contact:
    Yuhong Zhang

    Status:
    Draft Under Development