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。
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( A_0/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 VB_(12) and filth waterwith satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
1994年第4期41-43,共3页
Chinese Journal of Analysis Laboratory
关键词
钴
过氧化氢
荧光酮
OCPF
比色法
Catalytic-kinetic spectrophotornetry
o-chlorophenylfluorone
hydrogen peroxide
cobalt de-termination.
