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研究了钯钌合金中钌的测定方法。在强酸性溶液中（CHCl=5．0mol／L）和在有乙醇作稳定剂时，钌（Ⅲ）可与硫脲形成稳定的蓝绿色配合物；在最大吸收波长（λmax=620nm）处测定，50μg／50ml～250μg／50ml的钌（Ⅲ）符合比尔定律。大量的钯不干扰钌的测定。对钌含量为0．5％的钯钌合金8次测定，相对标准偏差为51％，加料回收率为95％～104％。该方法可用于含钌0．5％～2．5％的钯钌合金中钌的准确测定。
The determination of ruthenium in palladium-ruthenium alloy was studied. Ruthenium (III) forms a stable cyan complex with thiourea in strongly acidic solutions (CHCl = 5.0 mol / L) and in the presence of ethanol as a stabilizer; measured at the maximum absorption wavelength (λmax = 620 nm) , 50μg / 50ml ~ 250μg / 50ml ruthenium (Ⅲ) comply with Beer’s law. A large amount of palladium does not interfere with the determination of ruthenium. Palladium-ruthenium alloy with 0.5% ruthenium content was determined 8 times with relative standard deviation of 51% and feed recovery of 95% ~ 104%. The method can be used for accurate determination of ruthenium in palladium ruthenium alloy containing 0.5% ~2.5% ruthenium.