| 电位滴定法同时标定硫酸高铈和硫酸亚铁铵溶液 |
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| 引用本文： | 褚有群,冯建松,李丹丹,李照华,马淳安.电位滴定法同时标定硫酸高铈和硫酸亚铁铵溶液[J].理化检验(化学分册),2012(7):841-844. |
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| 作者姓名： | 褚有群 冯建松 李丹丹 李照华 马淳安 |
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| 作者单位： | 浙江工业大学化学工程与材料学院绿色化学合成技术国家重点实验室培育基地 |
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| 基金项目： | 浙江省科技厅(创新团队)项目(2011R09002-05) |
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| 摘 要： | 采用电位滴定法同时标定硫酸高铈标准溶液和硫酸亚铁铵标准溶液。以草酸钠为基准物质,通过对电位滴定装置的改进,在被滴定溶液与盐桥之间增加了一个一端封有磺酸型离子膜、内部注入2mol.L-1硫酸溶液的玻璃管,用来阻隔盐桥与被滴定溶液间的物质交换。方法用于硫酸高铈和硫酸亚铁铵溶液的标定,测定值的相对偏差为0.55%,表明方法具有高精度。
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| 关 键 词： | 电位滴定法 同时标定 硫酸高铈溶液 硫酸亚铁铵溶液 |
Simultaneous Standardization of Ce（SO4）2 and（NH4）2Fe（SO4）2 Solutions by Potentiometric Titration |
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| CHU You-qun,FENG Jian-song,LI Dan-dan,LI Zhao-hua,MA Chun-an.Simultaneous Standardization of Ce（SO4）2 and（NH4）2Fe（SO4）2 Solutions by Potentiometric Titration[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2012(7):841-844. |
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| Authors: | CHU You-qun FENG Jian-song LI Dan-dan LI Zhao-hua MA Chun-an |
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| Institution: | (State Key Laboratory of Breeding Base of Green Chemosynthetic Technology,College of Chemical Engineering and Material Science,Zhejiang University of Industry,Hangzhou 310032,China) |
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| Abstract: | The standard solutions of Ce(SO4)2 and(NH4)2Fe(SO4)2 were standardized simultaneously by potentiometric titration.Sodium oxalate was used as primary standard.In order to avoid the interference of mass exchange between the salt bridge and the measured solution with the result of titration,the titration device was modified.An ion-exchange membrane was set between the salt bridge and measured solution to depress the mass exchange at the interface.It was found that high precision was attained by the present method,giving values of relative deviation between the determined values of the 2 standard solution of 0.55%. |
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| Keywords: | Potentiometric titration Simultaneous standardization Ce(SO4)2 solution (NH4)2Fe(SO4)2 solution |
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