On the possibility to improve the performance of flow injection analysis by deconvolution of spectrophotometric data

Journal article

Authors/Editors

Andersen, Jens

Research Areas

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Publication Details

Author list: Andersen JET

Publisher: Elsevier

Place: AMSTERDAM

Publication year: 2001

Journal: Talanta: The International Journal of Pure and Applied Analytical Chemistry (0039-9140)

Journal acronym: TALANTA

Volume number: 54

Issue number: 1

Start page: 131

End page: 138

Number of pages: 8

ISSN: 0039-9140

eISSN: 1873-3573

Languages: English-Great Britain (EN-GB)

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Abstract

The concentration profile of chemical species pumped through a tubular system of 0.5-mm inner diameter is found to be trapezial shaped, as described theoretically by including the spatial resolution of the instrument, friction and diffusion. By applying the theory, which is based on the concept of segment flow. to experiments, it is shown that an injected segment of solute is diluted predominantly at the front and at the tail proportion of the segment in motion. A double-peaked structure in experiments of Row-injection analysis (FIA) was identified and by including all the data of the experimentally measured responses. it was possible to obtain an improvement of the sensitivity by a factor of 22 and obtain almost a factor of three times improvement on the standard deviation. (C) 2001 Elsevier Science B.V. All rights reserved.

Keywords

Analytical chemistry, chromate-DPC, flow-injection analysis, segment flow, theory

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