| 盐酸直溶法测定石灰石中氧化钙、氧化镁的含量 |
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| 引用本文： | 林培喜,李海焕,揭永文.盐酸直溶法测定石灰石中氧化钙、氧化镁的含量[J].茂名学院学报,2005,15(6):1-3,7. |
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| 作者姓名： | 林培喜 李海焕 揭永文 |
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| 作者单位： | 1. 茂名学院化工学院,广东,茂名,525000
2. 茂名石油化工公司炼油厂,广东,茂名,525011 |
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| 摘 要： | 在石灰石的氧化钙、氧化镁含量的测定中，比较了高温碱熔、高温烧结后盐酸溶样及盐酸直接溶样的方法；同时比较了不同指示剂的灵敏度。结果表明，三种溶样方法没有显著性区别。采用盐酸直接溶样，方法简单、安全、节能．、快速，准确度也能达到要求；在测定钙镁总量时，选用酸性铬蓝K-荐酚绿B（K-B）指示剂，终点比铬黑T灵敏。用盐酸直接溶样的方法可以代替高温碱熔的方法分析石灰石中的氧化钙和氧化镁的含量。
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| 关 键 词： | 石灰石 氧化钙 氧化镁 高温碱熔 |
| 文章编号： | 1671-6590（2005）06-0001-03 |
| 收稿时间： | 2005-05-30 |
| 修稿时间： | 2005-05-302005-06-13 |
Measuring Contents of CaO and MgO in Limestone by Direct HCl Dissolution |
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| LIN Pei-xi,LI Hai-huan,JIE Yong-wen.Measuring Contents of CaO and MgO in Limestone by Direct HCl Dissolution[J].Journal of Maoming College,2005,15(6):1-3,7. |
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| Authors: | LIN Pei-xi LI Hai-huan JIE Yong-wen |
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| Institution: | 1. Maoming College, Maoming ,525000, China; 2.Maoming Petrochemical Corporation Oil Refinery, Maoming ,525011, China |
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| Abstract: | In the determination of CaO and MgO content in limestone,three methods are adopted in comparison: high temperature alkali fuse,agglomeration HCldissolve and HCl direct dissolve.The sensitivity of different indicators is also compared.The results show no obvious differentiation with the sample.The direct HCl dissolution method is simple,safe,energy-saving and fleet,the accuracy also can attain request.When determining the total content of CaO and MgO,acid chrome blue K-naphthol green B(K-B) can produce higher sensitivity of terminal point than EBT.Thus we hold that the direct HCl dissolution method can replace the high temperature alkali fuse to analysis the calcium oxide and magnesian in limestone. |
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| Keywords: | li-mestone Cao MgO high temperature alkali fuse |
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