期刊
TALANTA
卷 72, 期 3, 页码 1186-1191出版社
ELSEVIER
DOI: 10.1016/j.talanta.2007.01.010
关键词
sequential injection; tetramethylbenzidine; free chlorine; spectrophotometry; waters
A sequential injection (SI) method was developed for the spectrophotometric determination of chlorine based on the reaction between tetramethylbenzidine (TMB) and free chlorine. The advantages resulting from the use of TMB are considerable: TMB is highly selective for chlorine, it enables a fairly low quantification limit and represents a less toxic alternative to reagents such as tolidine. The use of this reaction in SI adds other advantages as it enhances the degree of automation, minimisation of reagent consumption (6.8 mu g TMB/assay) and low effluent production (2.5 mL/determination). The developed method allowed a quantification limit of 90 mu g/L with a working range of 0.09-1.30 mg OCI-/L and a determination rate of 60 det./h. Based on these features, the system was applied to tap-water and surface water samples with no previous treatment required. The results obtained with the developed system were compared to the reference method, diethyl-p-phenylelediamine (DPD) colorimetric method, and proved not to be statistically different. (C) 2007 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据