钌的灵敏光度法研究——钌-硫氰酸盐-乙基紫体系

Study on a new sensitive spectrophot■metric method——Ruthenium (Ⅲ)-thiocyanate-ethyl violet

在聚乙烯醇存在下,用乙基紫和硫氰酸盐在水相测定钌的灵敏光度法。在0.42M 硫酸介质中,缔合物之λ_(max)为560nm,摩尔吸光度ε_(?)=1.1×10^(?)l·mol^(-1)·cm^(-1)。研究了此体系测定钌的适宜条件和线性范围以及各种共存离子的影响。测定某些贵金属样品中钌的结果与其他方法的结果吻合较好。

A sensitive spectrophotometric method forthe determination of ruthenium in aqueous me-dium with ethyl violet(EV)and thiocyan(?)te inthe presence of polyvinyl alcohol(PVA)wasdeveloped.It has been found that in 0.42 mol/lH_2SO_4 medium ε_(600) is 1.1×10~5l·mol^(-1)·cm^(-1).Op-timum conditions for the determination linearcalibration range and the interference of variousforeign ions are reported.This method had beenapplied to determine trace amounts of rutheniumin some precious samples.The results of the pre-sent method are in good agreement with those byother methods.