Organic chloramines have attracted considerable attention because of their potential toxicity and reactivity. However, the lack of suitable and effective analytical methods has limited the study of organic chloramines due to their volatile and unstable properties. In this study, membrane introduction mass spectrometry (MIMS) combined with DPD/FAS titration was used to monitor the formation of organic chloramines. N-chlorodimethylamine [(CH₃)₂NCl] and N-chlorodiethylamine [(C₂H₅)₂NCl] were detected and identified as the dominant volatile DBPs during chlorination of 18 organic compounds with dimethylamine or diethylamine functional groups, with yields ranging from 0.3% to 51.1% at a chlorine to precursor (Cl/P) molar ratio of 8.0. (CH₃)₂NBr was formed in the presence of bromide, while the formation of (CH₃)₂NCl was decreased. The reaction of phenol with (CH₃)₂NCl combined with theoretical calculations confirmed that the reactivity of (CH₃)₂NCl was similar to that of monochloramine. Moreover, (CH₃)₂NCl and (C₂H₅)₂NCl were observed at the ppb level during chlorination of actual water samples collected from different areas. The results suggest that (CH₃)₂NCl and (C₂H₅)₂NCl are important organic chloramines during chlorination, which may lead to the occurrence of further oxidation reactions and promote the formation of other disinfection byproducts simultaneously and should be of concern.

有机氯胺因其潜在的毒性和反应性而引起了广泛的关注。然而，由于有机氯胺的挥发性和不稳定的性质，缺乏合适和有效的分析方法限制了对有机氯胺的研究。在本研究中，膜引入质谱 (MIMS) 结合 DPD/FAS 滴定用于监测有机氯胺的形成。N-氯二甲胺[(CH ₃ ) ₂ NCl]和N-氯二乙胺[(C ₂ H ₅ ) ₂NCl] 在氯化 18 种有机化合物与二甲胺或二乙胺官能团的过程中被检测并鉴定为主要的挥发性 DBP，在氯与前体 (Cl/P) 摩尔比为 8.0 时，产率范围为 0.3% 至 51.1%。(CH ₃ ) ₂ NBr在溴化物存在下形成，而(CH ₃ ) ₂ NCl的形成减少。苯酚与(CH ₃ ) ₂ NCl的反应结合理论计算证实(CH ₃ ) ₂ NCl的反应性与一氯胺相似。此外，(CH ₃ ) ₂ NCl 和 (C ₂ H ₅) ₂在对从不同地区收集的实际水样进行氯化过程中观察到 ppb 级的 NCl。结果表明，(CH ₃ ) ₂ NCl和(C ₂ H ₅ ) ₂ NCl是氯化过程中重要的有机氯胺，可能导致进一步氧化反应的发生，同时促进其他消毒副产物的形成，应引起重视。 .