Ru^(3+)和[RuNO]^(3+)的速差动力学分析方法

Rate Differential Kinetic Analytical Method of Ru^(3+ ) and [RuNO]^(3+)

建立了用速差动力学分光光度法分析同一体系中Ru3+和[RuNO]3+的方法。在盐酸羟胺存在下,测定了Ru3+和[RuNO]3+与bipy的反应表观速率常数、浓度级次及反应平衡常数。通过测量反应产物Ru(bipy)32+的起始反应速率和平衡时的浓度,由建立的相关线性方程组计算出Ru3+和[RuNO]3+的浓度。Ru3+和[RuNO]3+的回收率分别为96%~105%和95%~106%。加入EDTA能较好地掩蔽常见金属离子的干扰。

A differential kinetic spectrophotometric method for simultaneous determination of Ru^3＋ and [RuNO]^3＋ in the same system was developed. The initial apparent rate constant, reaction order in term of Ru^3＋ or [RuNO]^3＋ concentration, equilibrium constant for the reaction of bipyridyl and Ru^3＋ or [RuNO]^3＋ in the presence of hydroxylamine hydrogenchloride were determined. By measurement of the initial formation rate and the equilibrium concentration of the product Ru（bipy）3^2＋ the concentrations of Ru^3＋ and [RuNO]^3＋ were easily calculated by solving the linear simultaneous equations. The recovery of Ru^3＋ and [ RuNO]^3＋ is found to be 96%～105% and 95%～106%, respectively. The interference of several common metal ions is substantially eliminated by addition of EDTA as a masking agent.