Evaluation of a novel PTFE material for separation and preconcentration of trace levels of metal ions in sequential injection (SI) and sequential injection lab-on-valve (SI-LOV) systems interfaced with detection by ETAAS

Xiangbao Long, Roongrat Chomchoei, Piotr Gała, Elo Harald Hansen

Research output: Contribution to conferencePosterResearch

Abstract

The operational characteristics of a novel PTFE bead material, granular Algoflon®, used for separation and preconcentration of metal ions via adsorption of on-line generated non-charged metal complexes, were evaluated in a sequential injection (SI) system furnished with an external packed column and in a sequential injection lab-on-valve (SI-LOV) system. Employed for the determination of cadmium(II), complexed with diethyldithiophosphate (DDPA), and detection by electrothermal atomic absorption spectrometry (ETAAS), its performance was compared to that of a previously used material, Aldrich PTFE, which had demonstrated that PTFE was the most promising for solid-state pretreatments. By comparing the two materials, the Algoflon® beads exhibited much higher sensitivity (1.6107 versus 0.2956 μg l-1 per integrated absorbance (s)), and better retention efficiency (82% versus 74%) and enrichment factor (20.8 versus 17.2), although a slightly smaller linear dynamic range (0.05-0.25 μg l-1 versus 0.05-1.00 μg l-1). Moreover, no flow resistance was encountered under the experimental conditions used. The results obtained on three standard reference materials were in good agreement with the certified values.
Original languageEnglish
Publication date2004
Publication statusPublished - 2004
Event8. Danske Symposium i Analytisk Kemi - Copenhagen, Denmark
Duration: 25 Aug 200426 Aug 2004
Conference number: 8

Conference

Conference8. Danske Symposium i Analytisk Kemi
Number8
CountryDenmark
CityCopenhagen
Period25/08/200426/08/2004

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