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新体系Co-H2O2-OCPF催化褪色光度法测定痕量钴的研究
The Studies on a New System of Catalytic Spec-trophotometry to Determine Trace Cobalt
【摘要】 本文研究了在碱性介质中,钴(Ⅱ)对过氧化氢氧化邻氯苯基荧光酮(OCPF)褪色反应,建立了催化光度法测定痕量钴的新方法。其检出限为8.2pg/mL,在0~3.5ng/mL范围内,钴(Ⅱ)与log(A_0/A)有良好线性关系。该指示反应灵敏度高选择性好,应用于维生素B_(12)和污水中钴的测定获得满意结果。
【Abstract】 Inabasic medium,traceCo(Ⅱ)can catalyze thediscolouring oxidization of o-chlorophenylfluorone(OCPF)by hydrogen peroxide.In the range of 0 to3.5ng/mL of Co(Ⅱ),a good linear relation exists be-tween the concentration of Co(Ⅱ)and lg( A0/A).The limit of detection is 8.2× 10 ̄(-12)g/mL. Vitamin Cis used to stop the action,thus a new method to deter-mine trace Co(Ⅱ)by spectrophotometry is estab-lished. The interference of more than 20 common ionshas been examined.This method was used in the de-termination of trace Co(Ⅱ)in VB12 and filth waterwith satisfactory results.
【Key words】 Catalytic-kinetic spectrophotornetry; o-chlorophenylfluorone; hydrogen peroxide; cobalt de-termination.;
- 【文献出处】 分析试验室 ,ANALYTICAL LABORATORY , 编辑部邮箱 ,1994年04期
- 【分类号】O614.812
- 【被引频次】16
- 【下载频次】80