On-Line Determination of Chemical Oxygen Demand and Total Phosphorus in Water by Using Fenton Reagents via a Micro-Spectrometer
XIE Ying-ke1,2,3, WEN Qun1,2*, WEN Zhi-yu1,2, MO Zhi-hong1,2, WEI Kang-lin1,2
1. Key Laboratory of Fundamental Science on Micro/Nano-Device and System Technology, Chongqing University, Chongqing 400044, China
2. Microsystem Research Center of Chongqing University, Chongqing 400044, China
3. Department of Optoelectronic Information, Chongqing University of Technology, Chongqing 400050, China
Abstract：This paper presents a system for on-line determination of chemical oxygen demand (COD) and total phosphorus (TP) in water by using Fenton reagents via a micro-spectrometer. The system uses Fenton reagents with ultrasonic-assisted to realize on-line digestion of organic compounds and organic phosphorus compounds in water samples under normal temperature and normal pressure, and uses a micro-spectrometer to realize multi-wavelength spectrophotometric detection. The results show that the system realize less measuring time, lower power consumption, simpler system structure and less secondary pollution. Moreover, the results show that the relative error is ≤10%, the limit of detection (LOD) are 2 mg·L-1 COD and 0.008 mg·L-1 TP, respectively, the sensitivities are 0.021 3 COD and 0.452 6 TP, respectively, and the precision is around 5.6% RSD at 15.0 mg·L-1 COD (n=7) and 5.8% RSD at 0.010 mg·L-1 TP (n=7). In addition, there are not significantly difference between the Chinese national standard analysis methods and the methods used in proposed system.
Key words：Water quality monitoring; Micro-spectrometer; Chemical oxygen demand; Total phosphorus; Spectrophotometric; Fenton reagent
基金资助: the instrument and equipment development project of National Nature Science Foundation of China(61327002)
通讯作者:
温 泉
E-mail: wen@enas.fraunhofer.de
作者简介: XIE Ying-ke, (1979—), lecturer, School of Science, Chongqing University of Technology e-mail:
xieyingke@cqut.edu.cn
引用本文:
谢瑛珂，温 泉，温志渝，莫志宏，魏康林. 基于Fenton试剂和微型光谱仪实现水质COD和总磷的在线测定[J]. 光谱学与光谱分析, 2017, 37(05): 1642-1648.
XIE Ying-ke, WEN Qun, WEN Zhi-yu, MO Zhi-hong, WEI Kang-lin. On-Line Determination of Chemical Oxygen Demand and Total Phosphorus in Water by Using Fenton Reagents via a Micro-Spectrometer. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(05): 1642-1648.
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