Determination of hydroxyl radicals in advanced oxidation processes with dimethyl sulfoxide trapping and liquid chromatography
Determination of hydroxyl radicals in advanced oxidation processes with dimethyl sulfoxide trapping and liquid chromatography
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DOI：
10.1016/j.aca.2004.08.019
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发表时间：
2004-11-29
影响因子：
6.2
通讯作者：
Zou, H
中科院分区：
文献类型：
--
作者：
Tai, C;Peng, JF;Zou, H
本文介绍了一种简便、灵敏的测定高级氧化过程中产生的羟基自由基的方法。该方法利用羟基自由基与二甲基亚砜（DMSO）反应生成甲醛，甲醛与2，4-二硝基苯肼（DNPH）反应生成相应的腙（HCHO-DNPH），采用液相色谱-紫外分光光度法进行分析。羟基自由基的检测限为0.54 μ mol L-1。用该方法测定了各种高级氧化工艺中羟基自由基的产率，比较了各种高级氧化工艺的氧化能力。(C)2004 Elsevier B. V.保留所有权利。
In this paper, a simple and sensitive method for the determination of hydroxyl radicals generated in advanced oxidation processes is described. The proposed method employed the reaction between hydroxyl radicals and dimethyl sulfoxide (DMSO) to generate quantitatively formaldehyde, which then reacted with 2,4-dinitrophenylhydrazine (DNPH) to form the corresponding hydrazone (HCHO-DNPH) and analyzed by liquid chromatography-UV Factors affecting the derivatization reaction of HCHO and trapping reaction of hydroxyl radicals, as well as the applicability of the method, were investigated. The detection limit for hydroxyl radicals was 0.54 mumol L-1. The method had been used to determine the yield of hydroxyl radicals in various advanced oxidation processes (AOPs) to compare their oxidation ability. (C) 2004 Elsevier B.V. All rights reserved.