本文采用紫外分光光度法同时测定工业废水中的对苯二甲酸(PTA)和对甲基苯甲酸(TOL),其检测下限分别为0.2mg/L和0.5mg/L,并讨论了废水中的氯离子、硝酸根及其它有机物对测定的干扰。本法简便、快速,可用于工业废水水质常规检测。 In this paper, the simultaneous determination of terephthalic acid (PTA) and p-toluylic acid (TOL) in industrial wastewater by UV spectrophotometry was studied. The detection limits were 0.2mg / L and 0.5mg / L, respectively. Chloride, nitrate and other organic compounds interfere with the assay. This method is simple, fast, can be used for routine testing of industrial wastewater quality.