| SIMULTANEOUS ANALYSIS OF Co(Ⅱ),Ni(Ⅱ),Cu(Ⅱ),Zn(Ⅱ)AND Cd(Ⅱ)BY SPECTROPHOTOMETRY AND THE KALMAN FILTER |
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| 作者姓名： | LEMING SHI ZHILIANG LI ZHIHONG XU ZHONGXIAO PAN LESHAN WANG Laboratory of Computer Chemistry Institute of Chemical Metallurgy Chinese Academy of Sciences Beijing P.R.China |
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| 作者单位： | LEMING SHI ZHILIANG LI ZHIHONG XU ZHONGXIAO PAN LESHAN WANG Laboratory of Computer Chemistry Institute of Chemical Metallurgy，Chinese Academy of Sciences，Beijing 100080，P.R.China |
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| 摘 要： | This paper describes the simultaneous determination of cobalt,nickel,copper,zinc and cadmium byspectrophotometry and the Kalman filter method.Co(Ⅱ),Ni(Ⅱ),Cu(Ⅱ),Zn(Ⅱ)and Cd(Ⅱ)react with 5-bromo-2-(2-pyridylazo)-5-diethylaminophenol(5-Br-PADAP)in the presence of cationic surfactant cetylpyridinium bromide(CPB)to form five different coloured ternary complexes.The absorption curves ofthese complexes overlap severely in the scanning range 500-620 nm.The Kalman filter algorithm issuccessfully applied to resolve the overlapped absorption curves and therefore makes the simultaneousdetermination of these metallic ions possible without tedious pretreatment.The proposed method isapplied to analyse the titled elements in synthetic samples and in environmental samples such as hair,fingernail and river water samples with satisfactory results.
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