A simple chemiluminescence method for determination of chemical oxygen demand values in water

被引：48
作者：
Hu, YG [1 ]
Yang, ZY [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Inst Environm Sci & Engn, Wuhan 430074, Peoples R China
来源：
TALANTA | 2004年 / 63卷 / 03期
基金：
中国国家自然科学基金;
关键词：
chemiluminescence; photodiode; chemical oxygen demand;
D O I：
10.1016/j.talanta.2003.11.037
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this paper, a low cost chemiluminescence detector with a photodiode instead of photo-multiplier tube (PMT) was developed for environmental monitoring of water quality. Based on the chemiluminescent reaction of luminol-H2O2-Cr3+ system, light emission caused by luminol-H2O2-Cr3+ system was detected by the photodiode, and its intensity caused by the appearance of Cr3+ after samples digestion was proportional to the chemical oxygen demand (COD). Effects for COD determining such as pH, concentrations, interference, and digestion procedures were investigated. The experimental results show that this suggested method uses an instrument that is simpler and cheaper than the previous ones used for the same purpose. The data obtained by the present method were fairly in good agreement with those obtained by the standard reflux titrimetric method. It has been applied to determine real samples with satisfactory results. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：521 / 526
页数：6
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