双波长催化动力学光度法间接测定痕量Bi(Ⅲ)  

Indirect Determination of Trace Bi(Ⅲ) by Dual-Wavelength Catalytic Kinetic Spectrophotometry

作　　者：肖葳蕤 孙登明[1] 朱庆仁[1] 厉帅[1] 

机构地区：[1]淮北师范大学化学与材料科学学院,安徽淮北235000

出　　处：《分析科学学报》2015年第2期288-290,共3页Journal of Analytical Science

基　　金：安徽省高校省级自然科学研究重点基金(No.KJ2011A255)

摘　　要：研究了在H2SO4介质中,利用Bi（Ⅲ）可定量置换出Cu（Ⅱ）-EDTA中的Cu（Ⅱ）,而Cu（Ⅱ）可催化H2O2同时氧化甲苯胺蓝和中性红褪色反应,通过测量524nm和630nm波长下的吸光度的变化,建立了双波长催化动力学分光光度法间接测定痕量Bi（Ⅲ）的新方法。方法的线性范围为0.00200-0.110μg/25mL,检出限为4.1×10^-11 g/mL。用于药物中铋的测定,结果满意。In the medium of H2SO4,based on the quantitative replacement of Cu（Ⅱ）by Bi（Ⅲ）from Cu-EDTA and the catalytic effect of Cu（Ⅱ）on the reactions between hydrogen peroxide and toluidine blue/neutral red,a new method of dual-wavelength catalytic kinetic spectrophotometry for the determination of Bi（Ⅲ）has been developed.The linear range was 0.00200-0.110μg/25 mL and the detection limit was 4.1×10^-11 g/mL.The method was applied to the determination of Bi（Ⅲ）in medicaments with satisfactory results.

关 键 词：分光光度法 Bi(Ⅲ) Cu(Ⅱ) 双波长 甲苯胺蓝 中性红 

分 类 号：O657.32[理学—分析化学]