| 银-邻二氮菲-二溴荧光素光度法测定银的含量 |
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| 引用本文： | 何池洋,陈友存,开小明,刘锋.银-邻二氮菲-二溴荧光素光度法测定银的含量[J].河南科技大学学报(自然科学版),2001,22(2):86-88. |
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| 作者姓名： | 何池洋 陈友存 开小明 刘锋 |
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| 作者单位： | 1. 安庆师范学院化学系,
2. 北京大学化学系, |
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| 摘 要： | 研究了银 -邻二氮菲 -二溴荧光素离子缔合物体系在水溶液中的显色反应 .在pH7.1NH4 Ac缓冲介质中 ,PVA - 12 4存在下 ,形成 1∶2∶1型红色的离子型缔合物 ,λmax=5 40nm ,ε =4.2 9× 10 4 L·mol-1·cm-1,银含量在 0～ 5 0 μg/ 2 5mL范围内符合比尔定律 ,在EDTA存在下本文提出的测定银的新方法选择性好、灵敏度高 ,用于相纸、废定影液和废水中银的测定 ,有很好效果。
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| 关 键 词： | 银 邻二氮菲 二溴荧光素 离子缔合物 光度法 |
| 文章编号： | 1000-5080(2001)02-0086-03 |
| 修稿时间： | 2001年3月7日 |
Spectrophotometric Determination of Silver with Bibromoflurescein and O-Phenanthroline |
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| HE Chi Yang ,CHEN You Cun ,KAI Xiao Ming ,LIU Feng.Spectrophotometric Determination of Silver with Bibromoflurescein and O-Phenanthroline[J].Journal of Henan University of Science & Technology:Natural Science,2001,22(2):86-88. |
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| Authors: | HE Chi Yang CHEN You Cun KAI Xiao Ming LIU Feng |
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| Institution: | HE Chi Yang 1,CHEN You Cun 1,KAI Xiao Ming 1,LIU Feng 2 |
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| Abstract: | The color reaction of bibromoflurescein and O-phenanthroline withsilver(Ⅰ) was studied. In the presence of PVA-124,an red stable ion complex formed in molar ratio 1∶2∶1 at pH7.1(ammonium acetate buffer solution) by associated the silver(Ⅰ) with O-phenanthroline and bibromoflurescein.The apparent molar absorptivity is 4.29×104 at the maximum absorption wavelength 540nm.Beer's law is obeyed in the range of 0～50μg/25mL for silver(Ⅰ).The method has a high selectivity and sensitivity in the presence of EDTA and has been applied to the determination of silver in photographic paper，fixer waste and industrial waste water with satisfactory results. |
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| Keywords: | Silver O Phenanthroline Bibromoflurescein Ion association complex Spectrophometry |
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