| 三溴偶氮胂光度法测定硅钙钡合金中钡含量 |
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| 引用本文： | 钟国秀,杨浩义,黄清华,卢钒.三溴偶氮胂光度法测定硅钙钡合金中钡含量[J].稀有金属与硬质合金,2010,38(1). |
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| 作者姓名： | 钟国秀 杨浩义 黄清华 卢钒 |
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| 作者单位： | 1. 湖北省机电研究设计院,湖北,武汉,430070
2. 湖北省建材研究设计院,湖北,武汉,430071 |
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| 摘 要： | 研究了三溴偶氮胂与钡的显色反应及共存离子的影响。结果表明,在0.3 mol/L的H3PO4介质中,钡与显色剂形成稳定的紫色络合物,最大吸收波长为618 nm,表观摩尔吸光系数为3.90×104L/(mol.cm);在25 mL的溶液中,钡量在0~40μg范围内符合比尔定律,显色反应具有较高灵敏度,方法可用于测定硅钙钡合金中钡含量,测定结果与认定值相符,其相对标准偏差(RSD)小于2%。
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| 关 键 词： | 三溴偶氮胂 分光光度法 硅钙钡合金 钡含量 |
Barium Determination of Si-Ca-Ba Alloy by Spectrophotometry with Tribromoarsenazo |
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| ZHONG Guo-xiu,YANG Hao-yi,HUANG Qing-hua,LU Fan.Barium Determination of Si-Ca-Ba Alloy by Spectrophotometry with Tribromoarsenazo[J].Rare Metals and Cemented Carbides,2010,38(1). |
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| Authors: | ZHONG Guo-xiu YANG Hao-yi HUANG Qing-hua LU Fan |
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| Affiliation: | ZHONG Guo-xiu1,YANG Hao-yi1,HUANG Qing-hua2,LU Fan1 (1.Hubei Reserch & Designing Institute of Mechanical Electronic Engineering,Wuhan 430070,China,2.Hubei Reserch & Designing Institute of Building Material,Wuhan 430071,China) |
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| Abstract: | The chromogenic reaction between tribromoarsenazo and barium was studied as well as the influences of coexistent ions on the reaction.The results show that barium reacts with the chromogenic reagent in 0.3 mol/L H_3PO_4 solution to form a stable purple complex,which exhibits an absorption maximum at 618 nm with an apparent molar absorptivity of 3.90×10~4 L/(mol cm).Beer's law is obeyed with the barium content of 0～40 μg/25 mL.The chromogenic reaction is of high sensitivity and the spectrophotometry can be used to determine the barium content of Si-Ca-Ba alloy.The determined results are in agreement with the certified values, and the relative standard deviation (RSD) is less than 2%. |
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| Keywords: | tribromoarsenazo spectrophotometry Si-Ca-Ba alloy barium content |
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