| 光谱学与光谱分析 |
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| Simultaneous Analysis of Trace Cu2+, Ca2+ and Zn2+ in Surface Water from Yangtze and Jialing River with Kalman Filter-Spectrophotometry |
| LIU Xin-an1,2,DING Yun-shong2,LUO Yan-feng3 |
1. Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
2. Chemistry & Chemical Engineering College, Chongqing University, Chongqing 400044, China
3. Bioengineering College, Chongqing University, Chongqing 400044, China |
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Abstract 1-(2-pyridine azo)-2-naphthol(PAN) is one of color reagent to determine the concentration of many trace metal ions. The analyzing conditions of PAN chelating reaction with three metal ions such as Cu2+, Cd2+ and Zn2+, the spectral properties at maximum absorption wavelength of these chelate compounds, pH effect and reaction time and so on were studied. Combining with Kalman filter algorithm and spectrophotometric simultaneously determining on-line technology the water samples containing the three metal ion compounds chelated with PAN from our laboratory, Yangtze Rive and Jialing River were analyzed quantitatively under optimal analysis condition, and the recovery is between 90.2%-106% for samples of laboratory. The analysis results for real samples from Yangtze Rive and Jialing River by the Kalman filtering algorithm compared with the corresponding pollution data from the governmental water quality monitoring sites at same sampling sites have well consistency so that the method could be directly, conveniently used for monitoring quantificationally real samples containing multimetal ions in various surface water of rivers simultaneously.
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Received: 2007-01-10
Accepted: 2007-04-20
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Corresponding Authors:
LIU Xin-an
E-mail: xaliu@cqu.edu.cn
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