Total organic carbon (TOC) is a valuable indicator to evaluate the degree of organic pollution in wastewater. Real-time analysis of TOC in wastewater can allow the wastewater treatment plants to manage the treatment process efficiently, avoid violations of the discharge regulations, and eliminate overtreatment. However, traditional methods for TOC determination are time-consuming. Benefitting from the rapid generation of SO₄^•− in the iron(II)-activated peroxymonosulfate (Fe(II)/PMS) system and the high reactivity of SO₄^•− towards naproxen as a chemiluminescence (CL) probe, a surrogate for TOC based on the determination of CL quenching capacity (CLQC) of organics in the Fe(II)/PMS-naproxen system was developed. According to the derived equation by considering both non-fluorescent and fluorescent quenching, the CLQC of organics in the Fe(II)/PMS-naproxen system was highly dependent on their TOC, making it to be a potential surrogate for TOC. The interferences of ubiquitous inorganic ions in wastewater on the determination of CLQC were leveled by adjusting electrical conductivity and adding mercury ions. Finally, the feasibility of CLQC as a surrogate for TOC in two real wastewaters containing different concentrations of inorganic anions was confirmed. This work can provide a TOC value within several seconds by determining the CLQC of wastewater with Fe(II)/PMS-naproxen system.

总有机碳（TOC）是评价废水中有机污染程度的重要指标。废水中TOC的实时分析可以让废水处理厂有效地管理处理过程，避免违反排放规定，杜绝过度处理。然而，传统的 TOC 测定方法非常耗时。受益于在铁 (II) 激活的过氧单硫酸盐 (Fe(II)/PMS) 体系中快速生成 SO ₄ ^{•-以及 SO} _{4的高反应性}^•-针对萘普生作为化学发光 (CL) 探针，开发了一种基于测定 Fe(II)/PMS-萘普生体系中有机物的 CL 猝灭能力 (CLQC) 的 TOC 替代物。根据同时考虑非荧光和荧光猝灭的推导方程，Fe(II)/PMS-萘普生系统中有机物的 CLQC 高度依赖于它们的 TOC，使其成为 TOC 的潜在替代物。通过调节电导率和添加汞离子来消除废水中普遍存在的无机离子对CLQC测定的干扰。最后，证实了在两种含有不同浓度无机阴离子的实际废水中，CLQC 作为 TOC 替代物的可行性。