| EDTA络合滴定石灰石中钙镁含量的实验分析 |
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| 引用本文： | 李霞. EDTA络合滴定石灰石中钙镁含量的实验分析[J]. 盐业与化工, 2014, 0(10): 10-12 |
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| 作者姓名： | 李霞 |
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| 作者单位： | 中盐吉兰泰盐化集团有限公司; |
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| 摘 要： | 工业生产和控制中钙镁测定多采用EDTA络合滴定分析,在实际测定中,发现当p H值大于12.5时,加入糊精、三乙醇胺、氢氧化钾及钙羧酸指示剂,用EDTA络合滴定Ca,以及在p H值为10时,加入盐酸羟胺、三乙醇胺、氨性缓冲溶液及酸性铬兰K-萘酚绿B指示剂,用EDTA络合滴定Mg具有广泛的适用性,实验在p H值大于12.5时,只加入三乙醇胺、氢氧化钾及钙羧酸指示剂,用EDTA络合滴定Ca做了初步的实验分析。
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| 关 键 词： | 滴定分析 钙 镁 EDTA滴定分析法 |
Experimental Analysis of Calcium and Magnesium Content in Limestone by EDTA Compleximetry |
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| LI Xia. Experimental Analysis of Calcium and Magnesium Content in Limestone by EDTA Compleximetry[J]. Jounral of Salt and Chemical Industry, 2014, 0(10): 10-12 |
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| Authors: | LI Xia |
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| Affiliation: | LI Xia (Inner Salt Jilantai Salt Group Co, LTD., Alashan 750336, China) |
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| Abstract: | Industrial production and control of calcium and magnesium determination were analyzed most by EDTA compleximetry. In the actual measurement,when p H was more than 12. 5,adding dextrin,triethanolamine,potassium hydroxide and calcium acid indicator complexed with EDTA titration of Ca,as well as PH was 10,adding hydroxylamine hydrochloride,triethanolamine,ammonia buffer solution and acid chrome blue K- naphthol green B indicator,complexometric titration with EDTA Mg,which had broad applicability. Only adding triethanolamine,potassium hydroxide and calcium acid indicator,complexometric titration with EDTA Ca was made a preliminary analysis of the experiment when the PH was greater than 12. 5. |
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| Keywords: | titration analysis calcium magnesium EDTA titration analysis |
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