CAJ | 학술논문

基于稀H2SO4介质中及70℃水浴加热下,Ru（Ⅲ）对高碘酸钾氧化甲基紫褪色反应有明显的催化作用,且催化作用的强弱与钌的加入量成正比,据此建立了催化动力学光度法测定痕量Ru（Ⅲ）的新光度分析方法。研究了反应的最佳条件。非催化反应与催化反应于波长581 nm处的吸光度差值与Ru（Ⅲ）的质量浓度ρ在0.02～1.5μg/25mL范围内呈良好的线性关系,检出限为1.933×10-10g/mL。测定了动力学参数,反应对Ru（Ⅲ）为一级反应,在试验条件下,总反应为准一级反应,表观速率系数为5.967×10-4/s,表观活化能为49.36 kJ/mol。对1.0μg/25mLRu（Ⅲ）标准试液测定的相对标准偏差为1.8%（n=11）。方法用于分子筛和活性炭样品中钌（Ⅲ）的测定,结果满意。
기우희H2SO4개질중급70℃수욕가열하,Ru（Ⅲ）대고전산갑양화갑기자퇴색반응유명현적최화작용,차최화작용적강약여조적가입량성정비,거차건립료최화동역학광도법측정흔량Ru（Ⅲ）적신광도분석방법。연구료반응적최가조건。비최화반응여최화반응우파장581 nm처적흡광도차치여Ru（Ⅲ）적질량농도ρ재0.02～1.5μg/25mL범위내정량호적선성관계,검출한위1.933×10-10g/mL。측정료동역학삼수,반응대Ru（Ⅲ）위일급반응,재시험조건하,총반응위준일급반응,표관속솔계수위5.967×10-4/s,표관활화능위49.36 kJ/mol。대1.0μg/25mLRu（Ⅲ）표준시액측정적상대표준편차위1.8%（n=11）。방법용우분자사화활성탄양품중조（Ⅲ）적측정,결과만의。
On condition of heating to 70℃ in water bath and diluted H2SO4 used as medium,the fading reaction in potassium periodate catalyzing methyl violet can be catalyzed by ruthenium（III）,and based on this phenomenon,a new catalytic kinetic spectrphotometry determination of ruthenium（III） has been founded.The optimum experimental conditions of the catalytic reaction was studied,and the absorbance difference between non-catalytic reaction and catalytic reaction remained good linear relationship with mass concentration ρ of ruthenium（III） in the range of 0.02~1.5μg/25mL at wavelength 581nm.The detection limit was 1.933×10-10 g/mL.The kinetic parameters were determined and showed that the reaction was first order to ruthenium（III） and pseudo first order to the whole reaction.The apparent rate constant was 5.967×10-4 /s,and the apparent active energy was 49.36 kJ/mol.The relative standard deviation for the determination of 1.0 μg /25mL ruthenium standard solution was 1.8%（n=11）.Applied to the determination of ruthenium in molecular sieve and active carbon samples,the recovery of this method was 98.8%~102.2% which fulfilled the requirement of analysis.