【摘要】 基于Fenton反应产生的羟基自由基(.OH)氧化过量的KI生成I3-。I-3分别与阳离子表面活性剂氯代十六烷基吡啶(CPC)、十六烷基三甲基溴化铵(CTMAB)、四丁基溴化铵(TBABr)、四丁基碘化铵(TBAl)、溴代十四烷基吡啶(TBP)、十四烷基二甲基苄基氯化铵(TDMAB)形成缔合物微粒,产生吸收峰。据此建立一种间接检测Fenton反应中羟基自由基的光度法。其中十六烷基三甲基溴化铵最稳定且灵敏,用它测定了模拟水样中羟基自由基和筛选抗氧化剂获得了满意的结果。更多还原

【Abstract】 A new method has been proposed for the determination of hydroxyl radical ·OH.This method was based on that hydroxyl radical of the Fenton reaction oxidized excess KI to form I-3.The cationic surfactant(cetylpyridinium chloride monohydrate,CPC;tetradecyl dimethl benzyl ammonium chloride,CTMAB;tetrabutylammonium bromide,TBABr;tetrabutylammonium iodide,TBAl;tetradecyl pyridinum bromide,TPB;tetradecyl dimethyl benzyl ammonium chloride,TDMAB) and I-3 combined to association particles that exhibited absorption peak.Among the six cationic surfactants,the CTMAB system was more sensitive and stable than other systems,and can be chosen for the determination of hydroxyl radicals in the analog environmental water,and for screening antioxidant with satisfactory results.更多还原