Electrocatalytical properties of a potassium hexacyanoferrate (II) modified polypyrrole electrode.: Application to vitamin C determination

被引：6

作者：

Alonso, JG ^{[1
]}

Sánchez, CD ^{[1
]}

García, MLT ^{[1
]}

Barbado, MDV ^{[1
]}

Batanero, PS ^{[1
]}

机构：

[1] Univ Valladolid, Fac Sci, Dept Analyt Chem, E-47005 Valladolid, Spain

来源：

ANALYTICAL LETTERS | 1999年 / 32卷 / 10期

关键词：

electrocatalysis; potassium hexacyanoferrate (II) modified polypyrrole electrode; vitamin C determination;

D O I：

10.1080/00032719908542945

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An electrocatalytic detection on a potassium hexacyanoferrate (II) modified polypyrrole electrode has been studied. The pyrrole electropolymerization was carried out on a Pt disk of 3 mm diameter, using constant potential chronoamperometry in the presence of the modifier. The electrochemical control of the electropolymerization and modification permit us to know the polymerisation charge, Q(p), as well as the number of moles of K4Fe (CN)(6) incorporated into the polymer at its generation step using Faraday's Law. Finally a determination method for vitamin C (ascorbic acid) using scan and differential pulse voltammetry was developed. This method was applied to determination of vitamin C in several samples, such as tablets and orange drinks, using the standard addition method.

引用

页码：1961 / 1980

页数：20

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