| 二溴荧光素荧光动力学分析法测定痕量钴 |
| |
| 引用本文： | 郭畅,王伦. 二溴荧光素荧光动力学分析法测定痕量钴[J]. 安庆师范学院学报(自然科学版), 2002, 8(3): 22-25. DOI: 10.3969/j.issn.1007-4260.2002.03.009 |
| |
| 作者姓名： | 郭畅 王伦 |
| |
| 作者单位： | 安徽师范大学,化学与材料科学学院有机化学研究所,安徽,芜湖,241000 |
| |
| 摘 要： | 对二溴荧光素-过氧化氢氧化还原体系进行了催化动力学荧光的研究,发现在pH=12.0的硼砂-氢氧化钠缓冲溶液中,钴(Ⅱ)离子能催化过氧化氢氧化二溴荧光素而使其荧光强度降低.在此基础上建立了快速、灵敏、简便的荧光催化动力学测定痕量Co(Ⅱ)的新方法,该催化反应的表现活化能为69.69 kJ/mol,检出限度0.25 ng/ml,线性范围为(0.4-1.2) ng/25ml.
|
| 关 键 词： | 催化动力学 荧光分析 钴离子 |
| 文章编号： | 1007-4260(2002)03-0022-04 |
Study on Catalytic Fluoremetry of Dibromofluorescein in Determination of Trace Cobalt |
| |
| GUO Chang,WANG Lun. Study on Catalytic Fluoremetry of Dibromofluorescein in Determination of Trace Cobalt[J]. Journal of Anqing Teachers College(Natural Science Edition), 2002, 8(3): 22-25. DOI: 10.3969/j.issn.1007-4260.2002.03.009 |
| |
| Authors: | GUO Chang WANG Lun |
| |
| Abstract: | A kinetic method for the determination of trace cobalt was established,based on its catalytic effect on the fluorescence fading reaction of dibromofluorescein oxidized by hydrogen peroxide in the medium of Na 2B 4O 7 NaOH(pH12.0).The optimized conditions for determination were founded.The calibration graph is linear for 0.4-1.2ng/25ml and the detection limit is 0.25 (ng/25ml)(Co).The active energy of catalytic reaction is 69.69kJ/mol.The cobalt contents in hair had been determined. |
| |
| Keywords: | catalytic kinetics fluoremetry cobalt(Ⅱ) |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
