| 控制电位氟-镓配位滴定法测定镓 |
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| 引用本文： | 张云,余婷,褚亮亮,李通化.控制电位氟-镓配位滴定法测定镓[J].分析试验室,2007,26(7):112-115. |
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| 作者姓名： | 张云 余婷 褚亮亮 李通化 |
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| 作者单位： | 同济大学化学系,上海,200092 |
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| 摘 要： | 以氟离子溶液作滴定剂,氟离子选择性电极作指示电极,利用氟-镓之间的配位反应及控制电位滴定法,对镓的测定进行了研究.控制溶液的pH约为4.2,实验温度为298 K,离子强度调节剂(NaNO3)的浓度为0.1 mol/L.对溶液控制的pH,氟离子的酸效应和镓离子的羟基配位效应对测定结果的影响,共存的Cu2 ,Zn2 ,Ni2 及Co2 等离子的干扰进行了讨论.
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| 关 键 词： | 镓 配位滴定 电位滴定 氟离子选择性电极 |
| 文章编号： | 1000-0720（2007）07-112-04 |
| 修稿时间： | 2006-07-242006-09-10 |
Determination of gallium with gallium-fluoride complexometry under constant potential |
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| ZHANG Yun,YU Ting,CHU Liang-liang,LI Tong-hua.Determination of gallium with gallium-fluoride complexometry under constant potential[J].Chinese Journal of Analysis Laboratory,2007,26(7):112-115. |
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| Authors: | ZHANG Yun YU Ting CHU Liang-liang LI Tong-hua |
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| Institution: | Department of Chemistry, Tongji University, Shanghai 200092 |
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| Abstract: | The determination of gallium with gallium-fluoride complexometry under constant potential using fluoride ion as titrant and fluoride ion selective electrode as the indicating electrode had been studied.The pH of titration reaction was about 4.2;the temperature of experiment was 298 K;and the concentration of ionic strength adjustment buffer(NaNO3) was 0.1 mol/L.The pH was controlled in the experiment,the acid effect of fluoride ion and the hydroxy effect of gallium ion which influenced the stability of gallium-fluoride complex had been discussed.The influence of Cu2 ,Zn2 ,Ni2 and Co2 on determination of gallium had also been discussed. |
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| Keywords: | Gallium Complexometry Potentiometric titration Fluoride ion selective electrode |
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