| 聚乙烯醇增溶锡-二甲酚橙高灵敏显色反应体系测定痕量锡的研究 |
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| 引用本文： | 孙汉文,梁淑轩,李理,张薇.聚乙烯醇增溶锡-二甲酚橙高灵敏显色反应体系测定痕量锡的研究[J].光谱学与光谱分析,2003,23(3):594-596. |
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| 作者姓名： | 孙汉文 梁淑轩 李理 张薇 |
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| 作者单位： | 河北大学化学与环境科学学院,河北,保定,071002 |
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| 摘 要： | 建立了用二甲酚橙作为显色剂直接测定痕量锡的新方法 ,锡与二甲酚橙在pH 3 5时形成的络合物 ,加入聚乙烯醇使稳定性大大提高 ,实验条件下显色络合物的最大吸收峰位于 5 4 4nm处 ,表观摩尔吸光系数ε =4 38× 10 5,线性范围为Sn 0 1～ 5 μg· (2 5mL) - 1 ,回收率为 97 4 %～ 10 1 1%。此方法选择性好、灵敏度高、操作简单 ,此方法用于分析水样中的微量锡 ,结果令人满意。
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| 关 键 词： | 锡 二甲酚橙 光度法 |
| 文章编号： | 1000-0593(2003)03-0594-03 |
| 修稿时间： | 2002年3月21日 |
Highly Sensitive Spectrophotometric Determination of Trace Amounts Tin in Water by Sn(Ⅳ)-XO-PVA System |
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| SUN Han-wen,LIANG Shu-xuan,LI Li and ZHANG Wei College of Chemical and Environmental Science,Hebei University,Baoding ,China.Highly Sensitive Spectrophotometric Determination of Trace Amounts Tin in Water by Sn(Ⅳ)-XO-PVA System[J].Spectroscopy and Spectral Analysis,2003,23(3):594-596. |
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| Authors: | SUN Han-wen LIANG Shu-xuan LI Li and ZHANG Wei College of Chemical and Environmental Science Hebei University Baoding China |
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| Institution: | College of Chemical and Environmental Science, Hebei University, Baoding 071002, China. |
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| Abstract: | A new spectrophotometric method for the determination of trace amount of tin (IV) has been developed based on the reaction of Sn (IV) with o-cresolphthalexon (XO), which forms a stable complex in the presence of polyvinyl alcohol (PVA). The complex exhibited a maximum absorbance at 544 nm. The molar absorption coefficient was 4.38 x 10(5) L.mol-1.cm-1. Recovery factor ranged from 97.4%-101.1%. Beers law was obeyed in the range of Sn 0.1-5 micrograms.(25 mL)-1. The complex was stable within 6 h. The suitable conditions for the reaction were investigated. The developed method has been applied to the determination of Sn (IV) in water samples. The result obtained is satisfactory. |
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| Keywords: | Tin O-cresolphthalexon(XO) Spectrophotometry |
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