荧光动力学分析法测定痕量鞣酸  

Kinetic Fluorimetric Determination of Trace Tannins

作　　者：冯素玲[1] 李俊[1,2] 樊静[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南省高等学校环境科学与工程重点学科开放实验室,新乡453002 [2]河南省焦作教育学院

出　　处：《分析化学》2003年第2期198-200,共3页Chinese Journal of Analytical Chemistry

基　　金：河南省教委自然科学基金 (No .199915 0 0 30 );河南省高等学校环境科学与工程重点学科开放实验室资助项目

摘　　要：基于鞣酸对Cu 催化过氧化氢氧化罗丹明B具有活化作用 ,提出了一种简单、高灵敏度的荧光动力学测定痕量鞣酸的新方法。该方法的线性范围为 0 .0 4～ 0 .72mg L ;检出限为 0 .0 2 5mg L。该方法已成功地用于茶叶中鞣酸含量的测定 ,并与FolinA simple and highly sensitive kinetic fluorimetric method was proposed for the determination of trace tannins, based on the activation of tannins to the oxidation of rhodamine B with hydrogen peroxide catalyzed by COD ion. The calibration graph was rectilinear in the range of 0.04 similar to 0.72 mg/L tannin, the detection limit for tannin was 0.025 mg/L. The proposed method has been successfully used to determine tannins in tea. The results obtained were compared with those provided by the Folin-Ciocalteu method.

关 键 词：荧光动力学分析法 测定 鞣酸 痕量分析 罗丹明B 催化氧化 过氧化氢 铜 

分 类 号：O657.3[理学—分析化学]