Application of redox cycling enhanced current at an interdigitated array electrode for iron-trace determination in ultrapure spectral carbon
✍ Scribed by D. Bustin; Š. Mesároš; P. Tomčík; M. Rievaj; V. Tvarožek
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 427 KB
- Volume
- 305
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
Vertically arranged interdigitated array (IDA) electrodes with a continuous Pt-film basis and a 0.5 pm thick insulation layer in the middle separating the upper Pt-IDA electrodes (26 pairs of 400 pm long fingers, 5 pm wide with 5 pm 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 (AA.9 proved the reliability of the proposed sample preparation procedure and IDA signal generation in the range of Fe content 1 X 10e5 to 1.5 X 10-j wt.%. The method can be considered as a less expensive alternative to the AAS determination of Fe pollutants in this ultrapure material.