茜素红-硼酸配合物双重光谱响应测定微量铜离子  

Dual spectral response to determine copper based on alizarin red S and boric acid complex

作　　者：廖文生[1] 吴芳英[1] 吴宇梅[2] 

机构地区：[1]南昌大学化学系南昌大学分析测试中心,南昌330031 [2]暨南大学珠海学院包装工程研究所,珠海519070

出　　处：《分析试验室》2008年第7期1-4,共4页Chinese Journal of Analysis Laboratory

基　　金：江西省教育厅(2005-38);湖南大学化学生物传感器与计量学国家重点实验室(2005018);江西省自然科学基金(2007GZH2119)项目资助

摘　　要：采用荧光光谱法和紫外可见吸收光谱法研究了Cu^2＋与茜素红（ARS）-H3BO3配合物间的相互作用。Cu^2＋使ARS-H3BO3配合物在587nm处的荧光猝灭，并且溶液颜色由黄色变为红色。研究结果显示：Cu^2＋对ARS的强结合能力使ARS-H3BO3配合物分解，同时形成ARS-Cu^2＋配合物，致使体系的荧光光谱和吸收光谱均发生明显变化。Cu^2＋浓度在1．0×10^-6～2．4×10^-5mol／L范围内，体系荧光强度变化与Cu^2＋浓度呈现良好的线性关系，方法检出限为1．01×10^-7mol／L。该方法用于废水中Cu^2＋的测定，回收率为95．5％～101．0％。The interaction between alizarin red S （ARS）-H3BO3 and Cu^2＋ was investigated via fluorescence and absorption spectroscopy. The fluorescence intensity at 587 nm was quenched by the addition of Cu^2＋ into ARS-H3BO3 system and the color changed from yellow to red. It was assumed that the addition of Cu^2＋ which resulted in spectral changes of ARS-H3BO3 system caused ARS-H3BO3 to be decompounded and ARS-Cu^2＋ complex was formed. A good linear response of fluorescence intensity as a function of Cu^2＋ concentration was obtained ranging from 1.0 × 10^-6 mol/L to 2.4×10^-5mol/L （ r = 0.996） with the detection limit of 1.01 ×10^-7 mol/L. The proposed method was applied to determine Cu^2＋ in discharged water and the recoveries were 95.5% - 101.0%.

关 键 词：CU^2+ ARS-H3BO3配合物 荧光分析法 分光光度法 

分 类 号：O657.3[理学—分析化学]