| 痕量银的催化动力学测定法研究 |
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| 引用本文： | 张振辉,周伟,闻一宁. 痕量银的催化动力学测定法研究[J]. 高等学校化学学报, 1987, 8(5): 407 |
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| 作者姓名： | 张振辉 周伟 闻一宁 |
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| 作者单位： | 江西大学化学系 |
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| 摘 要： | 研究了在稀硫酸溶液中,在Ag+的存在下,K4Fe(CN)6和o-Phen的反应(银的新指示反应),反应机理为并用此来测定痕量银。根据Arrhenius方程式计算了催化和非催化反应的活化能,分别为64.15KJ/mol和96.89KJ/mol。本方法灵敏度为8×10-12g·ml-1,且选择性好。测定地质样品结果满意。平均标准偏差为0.024,变动系数2.43%。
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| 收稿时间： | 1986-01-18 |
The Study of the Determination of Trace Silver by Catalytic Kinetics |
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| Zhang Zhenhui,Zhou Wei,Wen Yining. The Study of the Determination of Trace Silver by Catalytic Kinetics[J]. Chemical Research In Chinese Universities, 1987, 8(5): 407 |
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| Authors: | Zhang Zhenhui Zhou Wei Wen Yining |
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| Affiliation: | Department of Chemistry, Jiangxi University, Nanchang |
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| Abstract: | Anew indicator reaction catalyzed by silver has been studied. When silver is present K4Fe(CN)8reacts with o-phenanthroline in the solution of dilute H2SO4, the mechanism may be represented as follow:Fe(CN)64-+3(o-Phen)AgFe(o-Phen)2(ornge)+6CN-and trace silver could be estimated with the reaction.The apparent activation energies of catalytic and uncatalytic reaction are 64.15 and 96.89 kJ·mol-1, respectively, was calculated by Arrhenius Formula.Compared with other methods, this one is higher sensilivity and selectivity. The sensitivity is 8×10-12g·ml-1.The method has been used for the determination of silver in geological samples with satisfactory results .The average standard deviation of determination is 0.024 and the average coefficient variation 2.43%. |
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