桑色素荧光光度法测定铊  

Fluorophotometric Determination of Thallium(Ⅲ) With Morin as Fluorescent Reagent

作　　者：吴惠明[1] 李锦文[1] 陈永亨[1] 陈亮[1] 吴坚毅[1] 钟志光[2] 

机构地区：[1]广州大学化学化工学院化学系,广州510006 [2]广东出入境检验检疫局,广州510623

出　　处：《理化检验（化学分册）》2007年第8期653-654,657,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：广东自然科学重点基金(36210);省科技计划项目(2002C31607);广州市教育基金(2001001)

摘　　要：在pH 4.0的缓冲体系中,铊与桑色素具有较灵敏的荧光反应,在eλx=426 nm,eλm=489 nm处,铊(Ⅰ)的质量浓度在0.25～3.0μg/25 mL范围内与ΔF呈线性关系,其相对标准偏差为2.95%。对合成水样的测定,其回收率为96.1%～102.2%之间。采用活性炭吸附分离消除其它共有离子的干扰。In an acetate buffer medium of pH 4. 0, a sensitive fluorescence reaction was observed between TI（Ⅲ） and morin, having its excitation and emission wavelengths at 426 nm and 489 nm respectively. Linear relationship was found between the intensity of enhancement of fluorescence （△F） and the concentration of TI（ Ⅲ ） in the range 0. 25-3.0 μg in 25 mL of solution. Precision of the method was tested at the concentration level of 2 μg of TI（Ⅲ） per 25 mL of solution, and the value of RSD＇s （n= 7） obtained was 2. 95%. Several simulated water samples were analyzed by the proposed method, values of recovery found were in the range 96. 1% 102. 2%. Separation of TI（ Ⅲ） from co-existing ions by the active carbon adsorption was adopted in the analysis.

关 键 词：荧光光度法 铊 桑色素 水样 

分 类 号：O657.31[理学—分析化学]