三种二安替比林衍生物催化光度法测定痕量钌  

Catalytic spectrophotometric determination of ruthenium with three diantipyrylphenylmethane derivatives

作　　者：侯能邦[1] 陈吉书[1] 朱秀芳[2] 汪国松[2] 

机构地区：[1]曲靖师范学院化学系,云南曲靖655000 [2]云南大学化学系,云南昆明650091

出　　处：《曲靖师范学院学报》2003年第6期32-35,共4页Journal of Qujing Normal University

摘　　要：在磷酸介质和 90± 0 5℃热水浴中 ,Ru(Ⅲ )对高碘酸钾分别氧化 3种二安替比林衍生物 :二安替比林— (O—甲氧基 )苯基甲烷 (DAoMM) ,二安替比林— (m—甲氧基 )苯基甲烷 (DAmMM)和二安替比林—(P—甲氧基 )苯基甲烷 (DApMM)的增色反应有明显的催化作用 .由此建立了测定痕量钌的催化光度分析法 .DAoMM、DAmMM和DApMM催化反应体系的最大吸收波长分别为 :485 ,485和 445nm ,而它们的线性范围和检测限则依次为 ,0— 9 6μg/L ,0— 8 4μg/L,0— 6 0 μg/L;1 6× 1 0 -9g/mL,1 0 9× 1 0 -9g/mL ,1 3× 1 0 -9g/mL .DAoMM、DAmMM和DApMM催化反应的表观活化能分别为 5 8 3 0 ,69 1 0和 3 3 3 1kJ/mol.试验了 3 0多种共存离子的影响 ,方法的选择性较好 .其它贵金属和铁均不干扰测定 .该方法已用于冶金产品和岩矿中痕量钌的测定 ,其结果令人满意 .The catalytic effects of ruthenium on the oxidation reaction of three new diantipyrylphenylmethane derivatives: diantipyryl-(o-methoxyl)-phenylmethane (DAoMM), diantipyryl-(m-methoxyl)-phenylmethane(DAmMM) and diantipyryl-(p-methoxyl)-phenylmethane (DApMM),by KIO4 are investigated spectrophotometrically and applied for the kinetic determination of Ruthenium(Ⅲ)in H3PO4 medium at 90±0.5℃.Based on these reactions ,three new kinetic methods for spectrophotometric determination of trace Ru(Ⅲ) were developed. The above reactions are monitored spectrophotometrically by measuring the increase in the absorbance at 485, 485 and 445nm for the catalytic reactions of DAoMM, DAmMM and DApMM, respectively. The working curves for the three recommended reaction-rate methods are linear in the concentration range over 0-0.24, 0-0.21 and 0-0.15μg/25ml with the detection limit of 1.6×10 -9 ,1.09×10 -9 and1.3×10 -9 g/mL for DAoMM, DAmMM and DApMM methods ,respectively.The apparent activation energy of the three catalytic reactions are 54.80,67.32 and 31.72kJ/mol, respectivelly.The results obtained from the study on the effects of more than 30 kinds of coexisting ions on the determination of Ru(Ⅲ) suggested that the selectivity of the methods were good. The methods have been successfully applied for the determination of trace amount of ruthenium in some ores.

关 键 词：钌 催化动力学光度法 高碘酸钾 二安替比林衍生物 

分 类 号：O614.82[理学—无机化学] 1[理学—化学] O657.3