| 镧离子掺杂类普鲁士蓝复合汞膜电极的制备及电分析测定铅 |
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| 引用本文： | 方利,段德良,鲁建丽,吕政富,武云,曹秋娥,王家强.镧离子掺杂类普鲁士蓝复合汞膜电极的制备及电分析测定铅[J].昆明师范高等专科学校学报,2012(3):23-27. |
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| 作者姓名： | 方利 段德良 鲁建丽 吕政富 武云 曹秋娥 王家强 |
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| 作者单位： | 云南大学化学科学与工程学院自然资源药物化学重点实验室,云南昆明650091 |
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| 基金项目： | 云南省应用基础研究基金资助项目（2011FZ011） |
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| 摘 要： | 在镧离子掺杂类普鲁士蓝（La-PB）修饰的玻碳电极表面电沉积汞膜,制备了一种新型化学修饰复合汞膜电极La-PB/MFE/GC;研究了修饰层厚度、镀汞方式和汞膜成长过程对复合汞膜形成的影响;并以Pb2＋为探针离子,对镧、钴离子掺杂类普鲁士蓝复合汞膜电极和常规玻碳汞膜电极的汞膜稳定性和金属离子的溶出伏安行为等进行了对比研究;同时,应用该电极结合示差脉冲阳极溶出伏安法对实际水样中微量Pb2＋的质量浓度进行了测定.结果表明,Pb2＋在该复合汞膜电极上的阳极溶出氧化峰电流在4.82×10-9～4.82×10-7mol/L范围有良好的线性关系（r=0.995 5,n=13）,检出限为9.06×10-10mol/L,RSD值为2.6%,加标回收率为97%～102%.可用于实际样品的测定.
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| 关 键 词： | 复合汞膜电极 类普鲁士蓝 镧离子掺杂 溶出分析特性 铅 |
Preparation of the Composite Mercury Film Electrode Modified with Prussian Blue Analogue Doped with lanthanum Ion and its Electroanalysis of Lead |
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| FANG Li,DUAN De-liang,LU Jian-li,LU Zheng-fu,WU Yun,CAO Qiu-e,WANG Jia-qiang.Preparation of the Composite Mercury Film Electrode Modified with Prussian Blue Analogue Doped with lanthanum Ion and its Electroanalysis of Lead[J].Journal of Kunming Teachers College,2012(3):23-27. |
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| Authors: | FANG Li DUAN De-liang LU Jian-li LU Zheng-fu WU Yun CAO Qiu-e WANG Jia-qiang |
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| Institution: | (Key Laboratory of Medicinal Chemistry for Natural Resource,School of Chemical Science and Technology,Yunnan University,Yunnan Kunming 650091,China) |
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| Abstract: | A nove1 composite mercury film electrode modified with lanthanum-doped Prussian blue analogue（La-PB）（La-PB/MFE/GC） was prepared by electrodepositing mercury film on the La-PB film with glassy carbon e1ectrode.The effect of La-PB film thickness,mercury electrodepositing mode and mercury film growing procedure for building composite mercury film electrode were discussed.Mercury film′s stability and voltametric behavior were contrastively studied of La-PB/MFE/GC and MFE/GC using Pb2＋ as probe ions.Using this electrode by anodic stripping differential pulse voltametre to determine trace Pb2＋.The area of peak current and lead（Ⅱ） concentration had a good linearity relationship in range of 4.82×10-9—4.82×10-7 mol/L（r=0.995 5,n=13）,with detection limit was 9.06×10-10 mol/L（S/N=3） and RSD was 2.6% and recovery was 97%—102%.This method can be used to determine the concentration of lead for the real samples. |
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| Keywords: | chemical modified electrode Prussian blue analogue composite mercury film electrode anodic stripping performance lead |
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