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標題: A disposable screen-printed silver strip sensor for single drop analysis of halide in biological samples
作者: Chiu, M.H.
Cheng, W.L.
Muthuraman, G.
Hsu, C.T.
Chung, H.H.
Zen, J.M.
關鍵字: Screen-printed silver strip
Single drop analysis
Halide ion detection
Ag/Ag(x)O reference electrode
miniaturized reference electrodes
flow-injection determination
期刊/報告no:: Biosensors & Bioelectronics, Volume 24, Issue 10, Page(s) 3008-3013.
摘要: A screen-printed silver strip with three-electrode configuration of Ag-working, Ag-counter and Ag/Ag(x)O reference electrodes was developed for simultaneous determination of chloride, bromide and iodide in aqueous solutions. It was fabricated simply by screen-printing silver ink onto a polypropylene (PP) base. The in-situ prepared Ag/Ag(x)O reference electrode can avoid the leaching interference in chloride detection while using a conventional Ag/AgCl reference electrode. A single drop of analyte (50 mu l) is enough to determine iodide, bromide and chloride by measuring the well-separated oxidation peak currents of respective silver halides. The calibration graph was linear from 10 mu M to 20 mM for iodide and bromide and 100 mu M to 20 mM for chloride and the detection limit (S/N = 3) was 3.05 mu M 2.95 mu M and 18.83 mu M for iodide, bromide and chloride, respectively. The strip is designed to be disposable and as such manual polishing is not necessary. The proposed sensor is not only simple to manufacture and easy to operate but also fast and precise with little detection volume. It is successfully applied to the determination of halide ions in real samples. (C) 2009 Elsevier B.V. All rights reserved.
ISSN: 0956-5663
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