| 注入热焓法测定萃取磷酸中三氧化硫 |
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| 引用本文： | 吴孟强,张其翼.注入热焓法测定萃取磷酸中三氧化硫[J].分析化学,1998,26(4):407-409. |
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| 作者姓名： | 吴孟强 张其翼 |
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| 作者单位： | 电子科技大学信息材料工程学院!成都610054(吴孟强)，四川联合大学化工学院!成都610065(张其翼) |
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| 摘 要： | 以钡离子与硫酸根离子沉淀反应的热效应为基础，通过测定孤立体系中的温度变化，建立了测定萃取磷酸中三氧化硫的注入热焓法，该法在４．０－３２．０ｇ／Ｌ范围内可准确测定ＳＯ３的含量，相对标准偏差为１．８％；标准加入回收率为９８％－１０３％。
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| 关 键 词： | 注入热焓法 三氧化硫 萃取磷酸 磷酸生产 测定 |
Determination of Sulphur Trioxide in Extracted Phosphoric Acid by Injection Enthalpimetric Method |
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| Wu Mengqiang.Determination of Sulphur Trioxide in Extracted Phosphoric Acid by Injection Enthalpimetric Method[J].Chinese Journal of Analytical Chemistry,1998,26(4):407-409. |
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| Authors: | Wu Mengqiang |
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| Abstract: | An injection enthalpimetric method for the determination of SO3, has been devel- oped based on measuring the change of temperature in the isolated system during the exothermic reaction of Ba2+ and SO2-4. The concentration of SO3 may be determined in the range of 4. 0~32. 0 g/L with RSD of 1. 8% and recovery of 98%~103%. |
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| Keywords: | Injection enthalpimetric method sulphur trioxide phosphoric acid |
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