Kinetic Analysis of Metal Ions Based on Differences in Their Fluorospecificity and Reactivity

根据提出的研究项目，进行了一些实验，得到了以下结果：用荧光法研究了锡（II）和锡（IV）与莫林络合反应的动力学和热力学，设计了锡的鉴别分析方法。在所选择的条件下，可以选择性地测定Sn (IV)，最高可达1*10^<-5> M，检测限为2*10^<-7> M.2。研究了3-羟基-7-甲氧基黄酮和锡与桑精的络合反应，设计了这些金属离子的流动注射分析，并建立了Sb （III）、Sb (V)、Sn （II）和Sn （IV）的荧光测定条件。用荧光法研究了Sb (III)-3-羟基-7-甲氧基黄酮配合物与Cr （VI）的氧化反应，设计了Cr （VI）的灵敏分析方法。在选定的条件下，Cr （VI）的检出限可达3.2*10^<-6> M，检出限为2*10^<-7> M。Cr （VI）的2*10^<-7> M的检出量可容忍1400倍的Cr （III）的存在。研究了Zr （IV）和Hf （IV）与SXO络合反应的动力学，估计了这两种金属离子的γ参数。在相同的参数下，提出了设计一种新的基于Zr （IV）的配体取代反应的动力学催化分析方法的可能性。研究了Hg (II)-PAR配合物与CDTA的配体取代反应动力学，设计了一种灵敏、选择性的新型催化剂测定方法。在选定的条件下，在硫酸盐（按摩尔浓度计）为10000倍和25000倍的情况下，可测定浓度为1.5*10^<-6> M的亚硫酸盐和浓度为7*10^<-7> M的硫代硫酸盐，检出限分别为3*10^<-8> M和2*10^<-8> M。

Under the research projects proposed, some experiments were carried out and the following results were obtained.1. Kinetics and thermodynamincs for the complexation reaction of Sn (II) and Sn (IV) with morin have been studied fluorometrically to design a differential analysis of tins. Under the selected conditions, Sn (IV) up to 1*10^<-5> M could be selectively determined with a detection limit of 2*10^<-7> M.2. Comp lexation reactions of antiomy with 3-hydroxy-7-methoxyflavone and tin with morin have been studied to design flow-injection analysis of these metal ions, and conditions for the fluorometric determination of Sb (III), Sb (V), Sn (II), and Sn (IV) were established.3. Oxidation reaction of Sb (III)-3-hydroxy-7-methoxyflavone complex with Cr (VI) has been studied fluorometrically to design a sensitive analysis of Cr (VI). Under the selected conditions, Cr (VI) up to 3.2*10^<-6> M could be determined with a detection limit of 2*10^<-7> M.The presence of a 1400-fold amount (by molarity) of Cr (III) could be tolerated in the determination of 2*10^<-7> M of Cr (VI).4. Kinetics of the complexation reaction of Zr (IV) and Hf (IV) with SXO have been studied to estimate the gamma parameters for both metal ions. With the same parameter, some possibilities to design a new kinetic-catalytic method of analysis based on ligand-substitution reactions involving Zr (IV) were proposed.5. Kinetics of the ligand-substitution reaction of Hg (II)-PAR complex with CDTA have been studied to design a new sensitive and selective determination of a catalyst. Under the selected conditions, sulfite up to 1.5*10^<-6> M and thiosulfate up to 7*10^<-7> M could be determined with a detection limit of 3*10^<-8> M and 2*10^<-8> M in the presence of 10000-fold and 25000-fold amounts (by molarity) of sulfate, respectively.