催化过氧化氢氧化β,β-二羟基连二萘酚固体基质室温磷光猝灭法测定痕量钛  

Determination of Trace Titanium by Solid Substrate-room Temperature Phosphorescence Quenching Method Based on the Catalyzed Reaction of H_2O_2 Oxidizing β,β'-Dihydroxy-Dinaphthol

作　　者：李志明[1] 

机构地区：[1]漳州职业技术学院食品与生物工程系,福建漳州363000

出　　处：《喀什师范学院学报》2008年第6期45-48,共4页Journal of Kashgar Teachers College

基　　金：福建省自然科学基金计划资助项目(项目编号:2008J0313;D0510027)

摘　　要：基于Triton X-100增敏钛催化过氧化氢氧化β,β-二羟基连二萘酚（R）反应，导致R的固体基质室温磷光信号猝灭效应，建立了高灵敏度固体基质室温磷光（SS—RTP）测定痕量Ti（IV）的新方法．Ti（IV）量在0．010-2．00fg斑^-1（对应浓度范围0．025～5．0pg·mL^-1，点样体积0．40μL）与磷光信号△Ip成线性关系，回归方程△Ip=11．52＋10．73CTi（IV）（pg·mL^-1）}，r=0．9993，检出限0．0045fg·斑^-1（对应浓度为1．1×10^-14g.mL^-1）．所建立方法成功用于茶叶、人发样品中痕量钛的测定，加标回收率分别为99．2％和103．3％，RSD分别为2．9％和3．8％．A new solid substrate-room temperature phosphorimetry for the determination of trace titanium （IV） has been established. Based on the fact that triton X - 100 can spike titanium to catalyze H2O2 oxidizing β,β＇ -dihydroxy-dinaphthol （R）, which can cause sharp quenching of room temperature phosphorescence. The relationship between the △Ip of the emitting intensity and 0.01 --2.00 fg.spot^-1Ti（IV） （corresponding concentration： 0. 025-- 5.0 pg.mL^-1 sample volume 0.40 μL） conforms to the linearity. The regression equation of working curve can be expressed as △Ip= 11.52 ＋ 10.73 CTi（IV） （pg. mL^- 1 ）, r = 0. 9993. The limit detection （LD） is 0. 0045 fg.spot^-1 （corresponding concentration 1.1 --10^-14 g. mL^-1）. This method has been successfully applied to the determination of trace titanium （IV） in real samples of tea and human hair with satisfactory results, the standard addition recoveries are 99.2 % and 103.3 %, RSD are 2.9 % and 3. 8%.

关 键 词：钛(IV) β β-二羟基连二萘酚 Triton X-100 固体基质室温磷光法 

分 类 号：O657.313[理学—分析化学]