| 三溴偶氮胂光度法测定锶硅铁合金中Sr质量 |
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| 引用本文： | 杨浩义,卢钒,钟国秀. 三溴偶氮胂光度法测定锶硅铁合金中Sr质量[J]. 现代铸铁, 2010, 30(4): 91-93. DOI: 10.3969/j.issn.1003-8345.2010.04.014 |
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| 作者姓名： | 杨浩义 卢钒 钟国秀 |
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| 作者单位： | 湖北省机电研究设计院,湖北,武汉,430070 |
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| 摘 要： | 研究了显色剂三溴偶氮胂与Sr的显色反应。在0.3mol/L的H3PO4溶液中,Sr与三溴偶氮胂反应形成蓝色配合物,最大吸收波长为620nm,表观摩尔吸光系数为3.8×104L·mol-1·cm-1。25mL溶液中,Sr的质量在0～20μg范围内符合比尔定律。将此方法用于锶硅铁合金中微量Sr的直接测定时,相对标准偏差为2.2%～3.7%,标准加入回收率为96%～102%。
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| 关 键 词： | 锶硅铁合金 三溴偶氮胂 分光光度法 Sr |
Sr Mass Test of Sr-Si Alloy By Using Tribromoarsenazo Spectroscopy Method |
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| YANG Hao-yi,LU Fan,ZHONG Guo-xiu. Sr Mass Test of Sr-Si Alloy By Using Tribromoarsenazo Spectroscopy Method[J]. Modern Cast Iron, 2010, 30(4): 91-93. DOI: 10.3969/j.issn.1003-8345.2010.04.014 |
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| Authors: | YANG Hao-yi LU Fan ZHONG Guo-xiu |
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| Affiliation: | (Hubei Machino-Electrical Research and Design Institute, Wuhan 430070, Chnia) |
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| Abstract: | The colour reaction between the chromogenic reagent tribromoarsenazo （TAB）and Sr was investigated.In the 0.3 mol/LH3PO4, the reaction of Sr with TAB produced blue coordination compounds, its largest absorption wavelength was of 620 nm, apparent molar absorption coefficient was of 3.8×10^4 L·mol^-1·cm^-1.The mass of Sr in 25 mL solution was in the range of 0～20 where the Beers law was obeyed.When this method being used for the direct test of trace Sr in the SrSiFe alloy, the relative standard deviation was of 2.2%～3.7%, and the standard addition recovery was of 96%～102%. |
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| Keywords: | Sr |
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