Advances in the analysis of odorous substances derived from drinking water disinfection

In recent years, the issue of odor in drinking water has gained global attention. Disinfection is an important cause of odor in drinking water. Residual disinfectants and the generation of odorous disinfection byproducts (DBPs) are the reasons for the odor in drinking water caused by disinfection. Accurate quantitative analysis is a prerequisite for controlling and mitigating odorous substances in drinking water. Despite their concentration levels being in the ng/L range, odorous DBPs can cause significant water odor problems. Thus, the development of highly sensitive and selective qualitative and quantitative analysis methods is crucial. This review summarizes the sampling, sample pretreatment, and analytical detection techniques for these substances, particularly quantitative analysis. By assessing the current status, we present an overview of research advancements made in the determination of residual disinfectants and various odorous DBPs over the past decade while addressing challenges and discussing future research perspectives in this field.