APPLICATION OF REDOX CYCLING ENHANCED CURRENT AT AN INTERDIGITATED ARRAY ELECTRODE FOR IRON-TRACE DETERMINATION IN ULTRAPURE SPECTRAL CARBON

被引：28

作者：

BUSTIN, D ^{[1
]}

MESAROS, S ^{[1
]}

TOMCIK, P ^{[1
]}

RIEVAJ, M ^{[1
]}

TVAROZEK, V ^{[1
]}

机构：

[1] SLOVAK UNIV TECHNOL BRATISLAVA, DEPT MICROELECTR, BRATISLAVA 81219, SLOVAKIA

来源：

ANALYTICA CHIMICA ACTA | 1995年 / 305卷 / 1-3期

关键词：

INTERDIGITATED ARRAY ELECTRODES; REDOX CYCLING; IRON; ULTRAPURE SPECTRAL CARBON;

D O I：

10.1016/0003-2670(94)00418-L

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Vertically arranged interdigitated array (IDA) electrodes with a continuous Pt-film basis and a 0.5 mu m thick insulation layer in the middle separating the upper Pt-IDA electrodes (26 pairs of 400 mu m long fingers, 5 mu m wide with 5 mu m gaps) from the Pt-basis were applied for Fe trace analysis in ultrapure spectral carbon. The testing with spiked samples as well as comparison of results with those obtained by independent graphite-furnace atomic absorption spectrometry (AAS) proved the reliability of the proposed sample preparation procedure and IDA signal generation in the range of Fe content 1 X 10(-5) to 1.5 X 10(-4) wt.%. The method can be considered as a less expensive alternative to the AAS determination of Fe pollutants in this ultrapure material.

引用

页码：121 / 125

页数：5

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