Nafion修饰微铂电极示差脉冲微分溶出状安法测定Fe^（3＋）的研究

DIFFERENTIAL PULSE CATHODIC STRIPPING VOLTAMETRY OF FERRIC ON NAFION-COATED MICRO CYLINDER PLATINUM ELECTRODE

本文以２０ｕｍ铂业为基体，制备了Ｎａｆｉｏｎ修饰微铂电极，研究了Ｆｅ３＋在该电极上的溶出伏安特性，并应用于血清中的Ｆｅ３＋的测定，方法的最低检测限为５×１０－９ｍｏｌ／Ｌ，在５×１０－８～１．２×１０－６ｍｏｌ／Ｌ浓度范围内，Ｆｅ３＋的浓度与峰高呈良好的线性关系，平行七次测定的相对标准偏差为２．９２％，方法的回收率为１０２％．

Nafion-coated microcylinder electrode has been constructed by platinum wire(20 umin dialecter). The cathodic stripping voltalnetric characteristics on the microcylinder electrode arestudied in ferric solution. The electrode has been used to determine trace amount of ferric in serum.The detection limit of ferric is 5 x 10-9mol/L. There is a good Linear relationship between theconcentration of ferric and peak height in the range of 5 x 10-8 to 1.2 x 10-6 mol/L. The l.elativestandard deviation for seven parallel determination is 2.92% and a recovery 102%.