摘要
本文利用肝素与某些金属离子之间强烈的亲和作用，设计成了一种新型的伏安传感装置。这种用肝素修饰的玻碳电极被用于痕量铜的阳极溶出伏安测定。该电极制作简便，具有较好的重现性、选择性和较高的灵敏度。本方法测定铜的线性范围为２．０×１０－８ｍｏｌ／Ｌ～１．０×１０－６ｍｏｌ／Ｌ，检测下限为１．０×１０－９ｍｏｌ／Ｌ。同一支修饰电极平行测定１０次的相对标准偏差是３．２０％。
The strong affinity of heparin for some metal ions was exploited in the design of a new voltammetric sensing device.The application of a glassy carbon electrode modified with heparin is presented for the determination of trace copper(Ⅱ) by anodic stripping voltammetry.The electrode is easy to make ,and has good reproducibility,selectivity and high sensitivity.There is a linear relationship between the concentration and peak height in the range of 2.0×10 -8 mol/L ～1 0×10 -6 mol/L.The detection limit of Cu(Ⅱ) is 1.0×10 -9 mol/L and the relative standard deviation for ten parallel determintations is 3.20%.
出处
《分析试验室》
CAS
CSCD
1997年第4期13-16,共4页
Chinese Journal of Analysis Laboratory
基金
国家教委跨世纪青年科学基金
国家自然科学基金
中国科学院长春应用化学研究所电分析开放实验室资助
关键词
肝素
修饰电极
铜
溶出伏安法
Heparin
modified electrode
determination of Cu(Ⅱ)
anodic stripping voltammetry
