|Table of Contents|

Preparation of a Nafion/DNA/Pt Nanoparticles Composite Film Modified Electrode and Its Application for Highly Selective and Sensitive Determination of Dopamine(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2013年02期
Page:
67-73
Research Field:
化学
Publishing date:

Info

Title:
Preparation of a Nafion/DNA/Pt Nanoparticles Composite Film Modified Electrode and Its Application for Highly Selective and Sensitive Determination of Dopamine
Author(s):
Li Juan; Jia Liping; Yao Fei; Huo Ruiwei; Hou Guanwei; Jia Wenli; Wang Huaisheng
College of Chemistry and Chemical Engineering,Liaocheng University,Liaocheng 252059,China
Keywords:
platinum nanoparticles; DNA; dopamine; differential pulse voltammetry
PACS:
O657.1
DOI:
-
Abstract:
A new nanocomposite film modified electrode was preparaed by electrodepositing DNA at the platinum nanoparticles(PtNPs)surface and then coating Nafion on the composite film.This modified electrode(Nafion/DNA/PtNPs)was applied to detect dopamine(DA)by using differential pulse voltammetry(DPV).The result indicates that the Nafion/DNA/PtNPs nanocomposite film has electrocatalytic effect on the oxidation of DA and results in an obvious enhancement of the current response.In 0.1 mol/L pH 7.0 phosphate buffer solution(PBS),the DPV peak heights are linear with DA concentration in the range of 0.01-0.1 μmol/L and 0.1-6.0 μmol/L with the detection limit of 3.3 nmol/L(S/N=3).In addition,the interferences of uric acid(UA)and ascorbic acid(AA)can be effectively diminished.Moreover,the Nafion/DNA/PtNPs/GCE was applied to the DA detection in dopamine hydrochloride injection with satisfied results.

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Last Update: 2013-06-30