GB/T 30921.4-2016
ActiveTest method of purified terephthalic acid (PTA) for industrial use—Part 4: Determination of titanium content—Diantipyrylmethane photometric method
工业用精对苯二甲酸（PTA）试验方法 第4部分：钛含量的测定 二安替吡啉甲烷分光光度法
Application Summary AI generated
This standard specifies the diantipyrylmethane photometric method for determining titanium content in purified terephthalic acid (PTA) used in industrial applications. It is applied in quality control laboratories within the petrochemical industry to ensure PTA purity meets production requirements for polyester fibers, films, and bottles. The method is particularly relevant for detecting trace titanium catalyst residues that could affect downstream polymerization processes.
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