用于动力学分析的诱导反应体系较少.Sharma和Gupta等研究了Tl~(3-)-H_2O_2-Fe~(2+)诱导体系,并用该体系铈量法测定了H_2O_2.本文用铊(I)离子选择电极为指示电极研究了该体系反应物浓度、酸度、离子强度、温度和其它离子对反应速度的影响,用固定电位法测定了超痕量铁,测定下限可低至10~(-9)mol·dm~(-3)(0.056ppb).研究表明铁(Ⅱ)离子浓度与反应时 Induction reaction system for kinetic analysis is less .Sharma and Gupta et al studied the induction system of Tl ~ (3 -) - H_2O_2-Fe ~ (2+) and determined the amount of H_2O_2 by using this system. I) ion-selective electrode as the indicator electrode to study the system reactant concentration, acidity, ionic strength, temperature and other ions on the reaction rate, the determination of ultra-trace iron by fixed potential method, the determination of the lower limit can be as low as 10 ~ ( -9) mol · dm ~ (-3) (0.056ppb) .The results show that the iron (Ⅱ) ion concentration and reaction time