| Application of Nanometer-Size Titanium Dioxide in Extreme-Trace V（Ⅴ） Analysis |
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| 作者姓名： | QIAN Shahua~ LUO Yan~ MO Shaobo~ WENG Yue~ . College of Resources and Environmental Sciences Wuhan University Wuhan Hubei China . College of Chemistry and Molecular Sciences Wuhan University Wuhan Hubei China |
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| 作者单位： | QIAN Shahua~ 1，LUO Yan~ 1，MO Shaobo~ 2，WENG Yue~ 2 1. College of Resources and Environmental Sciences，Wuhan University，Wuhan 430079，Hubei，China;2. College of Chemistry and Molecular Sciences，Wuhan University，Wuhan 430072，Hubei，China |
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| 基金项目： | Supported by the Natural Science Foundation of Hubei Province |
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| 摘 要： | 0Introduction Vanadiumplaysanimportantroleinmodernindustry,es peciallyinsteelandchemicalindustry.Forinstance,itscompoundsarewidelyappliedintheproceduresofvitrioland petroleumchemicalmanufactureascatalyzers14].Vanadium hasseveralvalences,butgenerallyitslowvalencesturnintohighoneseasilyinenvironment5].BecauseV(Ⅴ)isthemost stableandpoisonousone,weoftenlayemphasisonitinenvi ronmentalpollutioncontrol.Vanadiumexistsinenvironmentalwaterwithextremelylowconcentration.Inseawateritscontentislessthan…
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| 关 键 词： | TiO2 纳米材料 石墨炉 原子吸收光谱 GFAAS 钒 |
| 文章编号： | 1007-1202（2006）02-0437-04 |
| 收稿时间： | 2005-04-19 |
Application of nanometer-size titanium dioxide in extreme-trace V(V) analysis |
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| QIAN Shahua ,LUO Yan ,MO Shaobo ,WENG Yue . College of Resources and Environmental Sciences,Wuhan University,Wuhan ,Hubei,China,. College of Chemistry and Molecular Sciences,Wuhan University,Wuhan ,Hubei,China.Application of nanometer-size titanium dioxide in extreme-trace V(V) analysis[J].Wuhan University Journal of Natural Sciences,2006,11(2):437-440. |
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| Authors: | Qian Shahua Luo Yan Mo Shaobo Weng Yue |
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| Institution: | (1) College of Resources and Environmental Sciences, Wuhan University, 430079 Wuhan, Hubei, China;(2) College of Chemistry and Molecular Sciences, Wuhan University, 430072 Wuhan, Hubei, China |
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| Abstract: | The adsorption properties of nanometer-size TiO2 for V(V) were studied. The adsorption rate could reach above 99% when the pH values were at the range of 4–10. The adsorption
balance time was 10 min, the saturation capacity of adsorption of nanometer-size TiO2 to V(V) was 6.43 mg per gram. Using 2 mL 1. 5 mol·L−1 NaOH as elution, we found the elution rate could reach 95%. A novel method of extreme-trace V(V) preconcentration with nanometer-size
titanium dioxide and determination by graphite furnace atomic absorption spectroscopy (GFAAS) was advanced. The detection
limit (3σ) of the method was 0.61 μg· L−1, and the relative standard deviation was 8.1% (n=6) of 2.5μg·L−1 V(V). Environmental samples experiments were also conducted to test the feasibility of the method, and it came out that the
recovery rates were between 91.2% and 102.0%.
Foundation item: Supported by the Natural Science Foundation of Hubei Province.
Biography: QIAN Shahua (1954-), female, Professor, research direction: environmental analytical chemistry |
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| Keywords: | nanometer-size TiO2 V(V) graphite furnace atomic absorption spectroscopy (GFAAS) extreme-trace analysis |
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