CS光度法检测Fenton反应中羟基自由基及应用  

Cationic Surfactant Spectrophotometric Determination of Hydroxyl Free Radical and Its Application

作　　者：梁月园[1] 梁桂寿[1] 温桂清[1] 蒋治良[1] 

机构地区：[1]广西师范大学环境与资源学院,广西桂林541004

出　　处：《广西师范大学学报（自然科学版）》2008年第1期80-83,共4页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(20767001);广西自然科学基金资助项目(0575042);广西师范大学博士科研启动基金资助项目

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。A new method has been proposed for the was based surfactant CTMAB on that hydroxyl radical of the Fenton determination of hydroxyl radical · OH. This method reaction oxidized excess KI to form I;. The cationic （cetylpyridinium chloride monohydrate,CPC; tetradecyl dimethl benzyl ammonium chloride, tetrabutylammonium bromide, TBABr ; tetrabutylammonium iodide, TBA1 ; tetradecyl pyridinum bromide,TPB; tetradecyl dimethyl benzy ciation particles that exhibited absorption peak ammonium chloride,TDMAB） and Ⅰ3ˉ combined to asso 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.

关 键 词：阳离子表面活性剂 羟基自由基 缔合微粒 模拟环境水样 羟基自由基清除剂 

分 类 号：O657[理学—分析化学]