作　　者： ; ;

机构地区： 南昌大学理学院应用化学研究所

出　　处： 《分析化学》 1996年第4期479-482,共4页

摘　　要： 水杨醛缩7-氨基-8-羟基喹啉-5-磺酸（简称S7N8Q5S）在酸性介质中分解，产物呈现荧光，V（V）对该反应具有催化作用，本文建立了催化荧光法测定痕量钒的新方法。体系在PH=2的柠檬酸钠-盐酸缓冲溶液中，λex／λem=342／499（nm）。测定V（V）的最佳反应条件为0.04％S7NSQ5S5.0mL，5％KBrO35．0mL，缓冲溶液5．0mL，90℃加热5min。V（V）含量在12.0～40.0μg／L的范围内有良好的线性。将该方法用于钒铬钢样品及水样中痕量钒的测定，结果满意。本文还详细探讨了反应机理。 Kinetic determination of V(V) based on its activating effect on the oxidation of salicylidene-7-amino-8-hydroxy-5 with KBrO3 in sodium citrate-HCl buffer solution (pH=2) has been studied. The fluorescence excitation and emission wavelengths of the oxidation product are 342 and 449 nm, respectively. The optimum conditions for the deThe linear range is 12. 0~ 40 . 0μg/L. The kinetics of the reaction has been studied and a probable rnechanisnl has been derived. The method has been applied satisfactorily to the determination of V(V) in ailoy and water samples.

关 键 词： 钒 荧光法 钒铬钢 水

领　　域： [理学] [理学] [理学] [理学]