借助于过氧化氢氧化溴苯三酚红的催化光度法测定钢样中的微量铬(英文)  

Spectrophotometric Catalytic Determination of Micro-amount Chromium in Steel Based on Oxidation of Bromopyrogallol Red by Hydrogen Peroxide

作　　者：舒和庆[1] 陈恕华[1] 

机构地区：[1]江苏大学化学化工学院,镇江212003

出　　处：《南京师范大学学报（工程技术版）》2003年第2期8-11,共4页Journal of Nanjing Normal University(Engineering and Technology Edition)

摘　　要：借助在弱酸性溶液中过氧化氢使溴苯三酚红褪色的催化效应测定了铬 (VI) ,研究了测定反应的最佳条件及各种离子的干扰效应 .利用Arrhenius方程计算了非催化和催化反应的表观活化能 ,检测限的线性范围为 0 1～ 0 6μgCr(VI) / 2 5mL ,检测限量达到 9 1× 10 - 1 0 g/mL .可以成功地应用于钢样中微量铬的测定 .Chromium (VI) was determined based on its catalytic effect on the decolorization reaction of Bromo Pyrogallol Red with hydrogen peroxide in weakly acidic solutions. The optimum condition for indicator reaction and interference effect of various ions have also been studied. The apparent activation energy of catalytic and non catalytic reactions were calculated by Arrhenius equation. The calibration curve is linear in the range of 0 1 to 0 6?μg Cr(VI)/25?mL. The detection limit reached down to 9 1×10 -10 ?g/mL. The method was successfully applied to the determination of micro amount Chromium in the steel.

关 键 词：微量分析 催化光度测定 铬 钢样 

分 类 号：O655.11[理学—分析化学]