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研究了显色剂N-烯丙基-N’-（对苯磺酸钠）硫脲与钌（Ⅲ）的显色反应。在4．5~6．0mol/L的HCl溶液中，钌（Ⅲ）与N-烯丙基-N’－（对苯磺酸钠）硫脲形成稳定的1:3蓝色水溶性络合物。最大吸收波长在630nm，表观摩尔吸光系数为2．30×104L·mol－1·cm－1；钌（Ⅲ）的浓度在0．4－3．2mg/L范围内服从比尔定律。此法具有显色稳定，选择性好，操作简便等优点。用于测定二次合金管理样和合成试样中钌，结果满意。
The color reaction of the reagent N-allyl-N ’- (sodium p-benzenesulfonate) thiourea with ruthenium (Ⅲ) was studied. Ruthenium (Ⅲ) forms a stable 1: 3 blue water-soluble complex with N-allyl-N’- (sodium p -benzenesulfonate) thiourea in 4.5-6.0 mol / L HCl solution Things. The maximum absorption wavelength at 630nm, the apparent molar absorption coefficient of 2.30 × 104L · mol-1 · cm-1; ruthenium (Ⅲ) concentration in the range of 0.4-3.2mg / L obey Bill’s law. This method has a color stability, good selectivity, easy operation and so on. Used for the determination of ruthenium in the secondary alloy management sample and the synthesized sample, with satisfactory results.