A Selective Flow-Rate Independent Flow Injection Analysis Technique: Combination of a Single Bead String Reactor with Rapid Scan Square-Wave Voltammetry

A Selective Flow-Rate Independent Flow Injection Analysis Technique: Combination of a Single Bead String Reactor with Rapid Scan Square-Wave Voltammetry

The response of a flow injection analysis with an electrochemical detector was made independent of the flow rate by using a singe bead string reactor tube (SBSR) and by operating the detector in the rapid-scan square-wave voltammetric mode. The SBSR reduced the flow-rate dependence of the maximum co...

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Veröffentlicht in:Analytical Sciences 1989/10/10, Vol.5(5), pp.567-570
Hauptverfasser: YOSHIZAWA, Daisuke, SHIMIZU, Kunio, SATO, Gen P., KUMAKURA, Konosuke, AOKI, Koichi
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Sprache:eng
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Analytical chemistry
Chemistry
Electrochemical methods
Exact sciences and technology
Flow injection analysis
square-wave voltammetry
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container_end_page 570
container_issue 5
container_start_page 567
container_title Analytical Sciences
container_volume 5
creator YOSHIZAWA, Daisuke
SHIMIZU, Kunio
SATO, Gen P.
KUMAKURA, Konosuke
AOKI, Koichi
description The response of a flow injection analysis with an electrochemical detector was made independent of the flow rate by using a singe bead string reactor tube (SBSR) and by operating the detector in the rapid-scan square-wave voltammetric mode. The SBSR reduced the flow-rate dependence of the maximum concentrations of the sample zone to 10% and the square-wave voltammetric peak height was virtually independent of the flow rate. The voltage scan was triggered at the point of the maximum concentration of the sample zone. The point was detected by monitoring the ECD current at a constant potential. The operation was controlled by a personal computer. The detection limits for [Fe(CN)6]4- and dopamine were ca. 0.6nmol (=2×10-5mol dm-3×29mm3). The use of square-wave voltammetry allowed for the simultaneous determination of more than one component.
doi_str_mv 10.2116/analsci.5.567
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subjects Analytical chemistry
Chemistry
Electrochemical methods
Exact sciences and technology
Flow injection analysis
square-wave voltammetry
title A Selective Flow-Rate Independent Flow Injection Analysis Technique: Combination of a Single Bead String Reactor with Rapid Scan Square-Wave Voltammetry
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