The application of oxidants for disinfection or micropollutant abatement during drinking water and wastewater treatment is accompanied by oxidation of matrix components such as dissolved organic matter (DOM). To improve predictions of the efficiency of oxidation processes and the formation of oxidation products, methods to determine concentrations of oxidant-reactive phenolic, olefinic or amine-type DOM moieties are critical.

Here, a novel selective oxidative titration approach is presented, which is based on reaction kinetics of oxidation reactions towards certain DOM moieties. Phenolic moieties were determined by oxidative titration with ClO₂ and O₃ for five DOM isolates and two secondary wastewater effluent samples. The determined concentrations of phenolic moieties correlated with the electron-donating capacity (EDC) and the formation of inorganic ClO₂-byproducts (HOCl, ClO₂⁻, ClO₃⁻). ClO₂-byproduct yields from phenol and DOM isolates and changes due to the application of molecular tagging for phenols revealed a better understanding of oxidant-reactive structures within DOM.

Overall, oxidative titrations with ClO₂ and O₃ provide a novel and promising tool to quantify oxidant-reactive moieties in complex mixtures such as DOM and can be expanded to other matrices or oxidants.

在饮用水和废水处理过程中，使用氧化剂进行消毒或微量污染物减排伴随着基质成分（如溶解有机物 (DOM)）的氧化。为了提高对氧化过程效率和氧化产物形成的预测，确定氧化反应性酚类、烯烃或胺型 DOM 部分浓度的方法至关重要。

在这里，提出了一种新的选择性氧化滴定方法，该方法基于对某些 DOM 部分的氧化反应的反应动力学。酚类部分通过用 ClO ₂和 O ₃氧化滴定测定五个 DOM 分离物和两个二次废水流出样品。酚类部分的确定浓度与给电子能力 (EDC) 和无机 ClO ₂副产物（HOCl、ClO ₂ ^-、ClO ₃ ^-）的形成相关。苯酚和 DOM 分离物的ClO _{2 -}副产品产量以及由于酚类分子标记的应用而发生的变化揭示了对 DOM 内的氧化剂反应结构的更好理解。

总的来说，用 ClO ₂和 O _{3 进行}氧化滴定提供了一种新颖且有前景的工具来量化复杂混合物（如 DOM）中的氧化剂反应部分，并且可以扩展到其他基质或氧化剂。