GB/T 30921.1-2014
ActiveTest method of purified terephthalic acid (PTA) for industrial use―Part 1：Determination of concentrations of 4-carboxybenzaldehyde (4-CBA) and p-toluic acid (p-TOL)
工业用精对苯二甲酸（PTA）试验方法 第1部分：对羧基苯甲醛（4-CBA）和对甲基苯甲酸(p-TOL)含量的测定
Application Summary AI generated
This standard specifies a high-performance liquid chromatography (HPLC) method for measuring the concentrations of 4-carboxybenzaldehyde (4-CBA) and p-toluic acid (p-TOL) in purified terephthalic acid (PTA) used for industrial purposes. It is applied in the quality control and production testing of PTA, a key raw material for polyester fibers, films, and polyethylene terephthalate (PET) bottles, ensuring the purity of PTA by limiting these critical impurities that affect downstream polymerization processes.
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