Catalyst Kinetics Analytical Method Study of Ruthenium
color reactions are used to determine ruthenium utilizing spectrophotometer, but the process need high temperature, long time pyrogenation and miscellaneous extraction and it contaminates the enviroment. As the sensitive degree and simple apparatus of catalyst kinetics analytical method, it was extensively attented. The fundmental principle means to determinn a certain chemistry reaction rate accelerated by homogeneous catalyst and determine substantial content using the function of the numerical value of of its and the catalyst concentration. Color acid double azo-reagents ( chloro - phosphor group, arsenic group and carboxylic acid group) are sensitive color reagent determining uranium and thorium of lanthanon, but the report is few that it is used to determine ruthenium. Since 1990s, die author studied that the ruthenium was possessed evident catalysis to the fade reaction of oxidant (KIO4, KBrO3) oxidating color acid double azo - reagent in acitidy medium and provided the catalyst kinetics analytical method to determine trace ruthenium. The reaction was carried in water phase and was heated 2 - 8min in boiling water (95℃). The sensitive degree was increased 1 -2 amount than color reaction. The reaction as:In the reactive equation: R1, R2, R3 can BE - Cl, - l, - Br, - NO2 - SO3H, - COOH, - C = O respectively.The original concentration of color acid double azo - reagents is A. The instantaneous absorbency after t reaction time is At. In homogeneous catalyst reaction: log(A0/At) = KCRU3+T. Reaction time t is invarible, so log(A0/At) = K” CRu3+t.Color acid double azo - reagents, such as: chlor - asochlorphosphor (CPA - TC), bromic azochlorphosphor (CPA - TB), DBS - azochorphosphor(DBS - CPA), DBC - azochlorphosphor (DBC -CPA), DBOK - azochlorpho sphor ( DBOK - CPA), p - iodineazochlorphosphor ( CPA - PI), p -acetylazochlorphosphor (CPA - PA), azochlorpho sphorⅢ (CPA Ⅲ), chlor - azoarsenic (TC - AsA), bromic- azoarsenic (TB - AsA), DBS - azoarsenic(DCS - AsA), DCS - azoarsenic(DCS - AsA), azoarsenicⅢ (AsAⅢ), bromicnityrlazoarsenic (DBN - AsA), P - acetylcarboxy lazo - p, P -acetylcarboxylazo, were utilized in catalyst kinetics system. The author obtains the satisfactory results that color acid double azo- rea gents was utilized to determine ruthenium of noble metal mine.
ruthenium KIO4 Color acid double azo-reagent fading- spectrophotometer
Kou Ming-De Zhan Hui-ying Kou Zong-yan
Chemistry department, United university of Gansu, Lanzhou, 730000
国内会议
兰州
英文
324-324
2003-12-01（万方平台首次上网日期，不代表论文的发表时间）