| 流动注射热焓法测定浸取磷酸中三氧化硫 |
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| 引用本文： | 张其翼,吴孟强.流动注射热焓法测定浸取磷酸中三氧化硫[J].分析化学,1999,27(10):1211-1214. |
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| 作者姓名： | 张其翼 吴孟强 |
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| 作者单位： | 1. 四川大学化工学院,成都,610065
2. 电子科技大学信息材料工程学院,成都,610054 |
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| 摘 要： | 以测量钡离子与硫酸根离子沉淀反应热效应的热焓法为基础，采用合并带流路建立了测定浸取磷酸中三氧化硫的流动注射热焓法。该法在４．０－４２．０ｇ／Ｌ范围内可准确测定了ＳＯ３的含量。相对标准偏差为１．６％，标准加入回怍率为９６％－１０４％；测样速度为６０样／ｈ。
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| 关 键 词： | 流动注射分析 热焓法 三氧化硫 浸取磷酸 |
Determination of Sulphur Trioxide in Extracted Phosphoric Acid by Flow Injection-Enthalpimetry |
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| Zhang Qiyi,Wu Mengqiang.Determination of Sulphur Trioxide in Extracted Phosphoric Acid by Flow Injection-Enthalpimetry[J].Chinese Journal of Analytical Chemistry,1999,27(10):1211-1214. |
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| Authors: | Zhang Qiyi Wu Mengqiang |
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| Abstract: | A flow injection-enthalpimetrical method with sample (SO42-) and reagent (Ba2+ ) mixed by merging zones system for the determination of SO3 in extracted phosphoric acid has been developed based on measurement of the change of the temperature during the exothermic reaction of Ba2+ and SO42-. The concentration of SO3 may be determined in the range of 4.0-42.0 g/L with RSD of 1.6%, recovery of 96%-104% and determination rate of 60 samples in one hour. |
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| Keywords: | Flow injection analysis enthalpimetry sulphur trioxide phosphoric acid |
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