羟基自由基
化学
食腐动物
过氧化氢
酒
清除
激进的
氧气
光化学
有机化学
抗氧化剂
作者
Lei Wang,Boqiang Li,Dionysios D. Dionysiou,Baiyang Chen,Jie Yang,Juan Li
标识
DOI:10.1021/acs.est.1c03796
摘要
Hydroxyl radical (•OH) is an active species widely reported in studies across many scientific fields, and hence, its reliable analysis is vitally important. Currently, alcohols are commonly used as scavengers for •OH determination. However, the impacts of alcohols on the reliability of •OH detection remain unknown. In this study, we found that adding different types and different amounts of alcohols in water samples treated with ultraviolet irradiation undesirably produced substantial amounts of hydrogen peroxide (H2O2), which is a known •OH precursor. This means that the conventional •OH determination method using alcohols is likely unreliable or even misleading. Through careful investigation, we revealed an overlooked reaction pathway during H2O2 and •OH transformations. Varying oxygen concentrations, pHs, alcohol dosages, and types altered H2O2 formation, which can affect •OH determination accuracy. Among alcohols, n-butanol is the best scavenger because it quenches •OH rapidly but re-forms little H2O2.
科研通智能强力驱动
Strongly Powered by AbleSci AI