二安替比林对溴苯基甲烷催化光度法测定钌的研究和应用  

Study on kinetic catalytic spectrophotometric determination of ruthenium with diantipyryl-(p-bromo)-phenylmethane

作　　者：黄章杰[1] 杨光宇[2] 尹家元[2] 徐其亨[2] 

机构地区：[1]云南大学科研处,云南昆明650091 [2]云南大学化学系,云南昆明650091

出　　处：《冶金分析》2002年第1期4-5,共2页Metallurgical Analysis

摘　　要：在磷酸介质中及加热条件下 ,Ru 对KIO4 氧化二安替比林对溴苯基甲烷 (DApBM )显色具有明显的催化作用 ,由此建立了一种测定钌的新方法。催化体系和非催化体系最大吸收波长均为 490nm。钌的含量在 0～ 10 0ng/ 2 5mL范围内符合比尔定律 ,方法检出限为 1 2 4× 10 - 1 0 g/mL ,反应表观活化能为 89 12kJ/mol,反应表观速率常数为 7 18× 10 - 4s- 1 ,方法用于矿石样品中痕量钌的测定 。A kinetic spectrophotometric method for the determination of ruthenium has been established,which is based on its catalytic effect on the color reaction of diantipyryl (p bromo) phenylmethane(DApBM) oxidized by potassium periodate in phosphoric acid medium in heating water bath.The maximum absorbance both of catalytic and noncatalytic systems is at 490nm, Beer's law is obeyed in the concentration range of 0-100ng/25mL,and the detection limit is 1.24×10 -10 g/mL.This method can be applied to the determination of ruthenium in ores with satisfactory results.

关 键 词：二安替比林对溴苯基甲烷 催化光度法 钌 测定 

分 类 号：O657.3[理学—分析化学]