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1.前言催化动力学分析方法以高灵敏度显示其长处,方法的基本原理是根据反应速度与催化剂浓度(被测物浓度)成简单函数关系而进行定量。其测试手段,则多数采用分光光度法,因其具有简便、快速的特点而受到人们欢迎。关于银的测定,以目前现行的双硫腙萃取光度法,摩尔吸光系数仅为3×10~41·mol~(-1)·cm~(-1);若采用催化光度法,则灵敏度可大大提高。笔者曾报道银(Ⅰ)—过硫酸钾—α,(?)′-联吡啶—三苯甲烷染料催化体系测定银的若干研究结果。然而,以含氨基三苯甲烷染料作指示物质,利用上述体系研究银(Ⅰ)的催化动力学行为,则尚未见于文献。
1. Introduction Catalytic kinetic analysis shows its merits with high sensitivity. The basic principle of the method is to quantify the relationship between the reaction rate and the catalyst concentration (analyte concentration) as a simple function. The test method, the majority of spectrophotometry, because of its simple, fast features and welcomed by people. With regard to the determination of silver, the molar absorption coefficient of the present dithizone extraction spectrophotometry is only 3 × 10 ~ 41 · mol -1 (-1) cm -1; if the catalytic spectrophotometry is adopted, the sensitivity can be Greatly improve. The author has reported a number of silver (Ⅰ) - potassium persulfate-α, (?) - - bipyridine-triphenylmethane dye catalytic system for the determination of a number of studies. However, the use of aminotrimethylene dyes as the indicator substance, the use of the above system to study silver (I) catalytic kinetic behavior has not been found in the literature.