| PEI与Cr（Ⅲ）螯合物结构的测定及其分析应用 |
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| 引用本文： | 卫睿华.PEI与Cr（Ⅲ）螯合物结构的测定及其分析应用[J].科学之友,2009(10):86-88. |
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| 作者姓名： | 卫睿华 |
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| 作者单位： | 山西省计量监督检定测试所; |
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| 摘 要： | 使用分光光度法与电导滴定法研究了聚乙烯亚胺（PED与Cr^3＋的配合过程，测定了二者形成的螯合物结构。Cr^3＋与水溶性聚胺PEI可以定量地形成六配位螯合物，而且配合过程速度很快，螯合物稳定；在用PEI水溶液滴定Cr^3＋过程中，体系的电导率快速下降，在滴定终点电导率发生了清晰的转变。建立了测定Cr^3＋含量的一种新方法-PEI螯合作用电导滴定法，考察了各种因素对分析方法的影响，优化了分析条件。
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| 关 键 词： | 聚乙烯亚胺 铬离子 螯合物 电导滴定 |
Determing the Structure of Chelate Complex of Polyethyleneimine with Chromium Ion and Its Analysis Application |
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| Wei Ruihua.Determing the Structure of Chelate Complex of Polyethyleneimine with Chromium Ion and Its Analysis Application[J].Friend of Science Amateurs,2009(10):86-88. |
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| Authors: | Wei Ruihua |
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| Abstract: | Cooperate process of PEI with chromium ion was studied by using spectrophotometric analysis and conductometric titration, and the structure of the chelate was determined. The experimental result showthat the chelate with four coordinations forms between polyethyleneimine and Cr3+ ion,the rate of coordination is fast,and the chelate is stable. During titration process of PEI aqueous solution against Cr3+ solution,the conductivity decrease rapidly, and breakover occurs at end point of titration. Based on the ... |
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| Keywords: | polyethyleneimine chromium ion chelate conductometric titration |
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