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| 铑-钨酸盐-罗丹明B缔合显色反应的研究及应用 | |
| 引用本文： | 曹秋娥,李祖碧,王加林,徐其亨. 铑-钨酸盐-罗丹明B缔合显色反应的研究及应用[J]. 分析试验室, 2001, 20(1): 29-31 |
| 作者姓名： | 曹秋娥 李祖碧 王加林 徐其亨 |
| 作者单位： | 1. 云南大学化学系, 2. 云南大学成人教育学院, 3. 云南大学化学系,.云南大学成人教育学院, |
| 摘 要： | 在聚乙烯醇 (PVA)存在下 ,铑 ( )与钨酸盐及罗丹明 B(RB)形成的离子缔合物在 570 nm处产生最大吸收。建立了测定铑 ( )的光度分析方法 ,其表观摩尔吸光系数 ε达 1 0 7(L·mol-1·cm-1)数量级。方法的检测范围为 0～ 50ng/2 5m L ,检出下限为 0 .2 9ng/2 5m L。大量存在的常见离子对 Rh( )的测定不干扰。用此方法测定了催化剂及工业产品中铑的含量 ,结果与标准方法 (Sn Cl2法 )一致。 |
| 关 键 词： | 铑 罗丹明B 钨酸盐 光度法 测定 催化剂 工业产品 缔合显色反应 |
| 文章编号： | 1000-0720(2001)01-0029-03 |
Study on Color Reaction of Ion-associated Complex of Rhodium-tungstate-rhodamine B and Its Application |
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| CAO Qiu-E,XU Qi-heng,LI Zu-bi,WANG Jia-lin. Study on Color Reaction of Ion-associated Complex of Rhodium-tungstate-rhodamine B and Its Application[J]. Chinese Journal of Analysis Laboratory, 2001, 20(1): 29-31 | |
| Authors: | CAO Qiu-E XU Qi-heng LI Zu-bi WANG Jia-lin |
| Abstract: | The ion-associated complex formed by rhodium,tungstate and rhodamine B(RB) in the presence of polyvinyl alcohol(PVA) has a maximum absorbance at 570 nm.A sensitive method for determination of Rh(Ⅲ) was developed based on this reaction. Its apparent molar absorptivity is more than 107 L*mol-1*cm-1 with a linear range is 0～50 ng/25mL Rh(Ⅲ) and detection limit of 0.0114 ng/mL. Other ions in samples did not interfere the determination of rhodium. The results for determination of rhodium in real samples obtained by this method were consistent well with those obtained by SnCl2 method. |
| Keywords: | Rhodium Rhodamine B Tungstate Spectrophotometry |
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