| EDTA络合滴定与酸碱滴定联合测定含锌碱性溶液中游离碱、锌和碳酸钠 |
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| 引用本文： | 刘清,赵由才,招国栋,郭翠香. EDTA络合滴定与酸碱滴定联合测定含锌碱性溶液中游离碱、锌和碳酸钠[J]. 冶金分析, 2006, 26(6): 1-1 |
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| 作者姓名： | 刘清 赵由才 招国栋 郭翠香 |
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| 作者单位： | 同济大学污染控制与资源化研究国家重点实验室,同济大学污染控制与资源化研究国家重点实验室,南华大学建筑工程与资源环境学院,同济大学污染控制与资源化研究国家重点实验室 上海200092,上海200092,湖南衡阳421001,上海200092 |
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| 摘 要： | 提出了EDTA络合滴定和酸碱滴定联合测定碱法炼锌中含锌碱性溶液中游离碱、锌和碳酸钠的新方法。以酚酞和甲基橙作指示剂,用盐酸标准溶液进行滴定;用EDTA测定溶液中锌含量,最后利用盐酸和EDTA的消耗量联合计算含锌碱性溶液中游离碱和碳酸钠量。通过理论计算验证了该方法酸碱滴定部分的分级滴定和直接滴定的可行性,并对碱浓度、碳酸钠浓度和干扰元素对测定的影响进行了研究。该测定方法操作简捷,具有良好的准确度和精密度,游离碱和锌测定结果的RSD小于0.3%、碳酸钠测定结果的RSD小于3.4%(n=6),回收率在97.7%
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| 关 键 词： | EDTA络合滴定 酸碱滴定 碱 锌 碳酸钠 |
| 文章编号： | 1000-7571（2006）06-0010-04 |
| 收稿时间： | 2005-12-30 |
| 修稿时间： | 2005-12-30 |
Determination of free alkali,zinc and sodium carbonate in zinc aqueous alkali by uniting EDTA complexometric titration and acid base titration |
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| LIU Qing,ZHAO You-cai,ZHAO Guo-dong,GUO Cui-xiang. Determination of free alkali,zinc and sodium carbonate in zinc aqueous alkali by uniting EDTA complexometric titration and acid base titration[J]. Metallurgical Analysis, 2006, 26(6): 1-1 |
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| Authors: | LIU Qing ZHAO You-cai ZHAO Guo-dong GUO Cui-xiang |
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| Affiliation: | 1 . State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China; 2. School of Architectural Engineering, Resources and Environment, Nanhua University, Hengyang 421001, China |
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| Abstract: | A new method for determining the concentration of free alkali,zinc and sodium carbonate had been investigated.By using phenolphthalein and methyl orange as indicators,free alkali,zinc and sodium carbonate were titrated with hydrochloric acid and zinc was titrated with EDTA.The concentrations of free alkali and sodium carbonate were calculated with the consumption of hydrochloric acid and EDTA standard solution.The feasibility of acid base titration had been validated through the theoretical calculation.In addition,the effects of the concentration of alkali,sodium carbonate and metallic impurities on the determination had been studied,respectively.The RSDs for the determination were less than 0.3% for free alkali and zinc and 3.4% for sodium carbonate. The recoveries were in range of 97.7%-107.6%.This method was rapid,convenient and accurate. |
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| Keywords: | EDTA complexometric titration acid base titration alkali zinc sodium carbonate |
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