过氧化氢-番红花红O催化光度法测定痕量铜的研究  

Study on catalytic kinetic spectrophotometric determination of trace copper with hydrogen peroxide and safranine O

作　　者：庄会荣[1] 

机构地区：[1]临沂师范学院化学与环境科学系,山东临沂276005

出　　处：《冶金分析》2004年第4期43-45,共3页Metallurgical Analysis

摘　　要：研究了NH3·H2 O -NH4 Cl介质中 ,痕量铜 对过氧化氢氧化水溶性番红花红O的催化褪色作用 ,建立了催化光度法测定痕量铜的新方法 ,并研究了反应的最佳条件 ,测定了反应动力学参数。方法的线性范围为 0 0 15～ 6ng/mLCu2 + ,检出限为 0 15ng/mL ,用于蒸馏水及化学试剂中痕量铜的测定 。A new catalytic spectrophotometric method for the determination of trace amounts of copper was developed.The method is based on catalysing effect of copper on decoloring reaction of safranine O oxidized by hydrogen peroxide in NH_3·H_2O-NH_4Cl medium.The optimum conditions and the kinetic parameters were studied.The linear range is 0.015～6 ng/mL for copper with detection limit of 0.15 ng/mL.The method has been applied to the determination of trace amounts of copper in distilled water and NaOH samples with satisfactory results.

关 键 词：痕量铜 催化光度法 褪色作用 铜(Ⅱ) 反应动力学 最佳条件 过氧化氢 番红花 蒸馏水 研究 

分 类 号：O657.32[理学—分析化学]