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 language | English |
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Publication date | 2004 |
Publication status | Published - 2004 |
Event | 8. Danske Symposium i Analytisk Kemi - Copenhagen, Denmark Duration: 25 Aug 2004 → 26 Aug 2004 Conference number: 8 |
Conference
Conference | 8. Danske Symposium i Analytisk Kemi |
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Number | 8 |
Country/Territory | Denmark |
City | Copenhagen |
Period | 25/08/2004 → 26/08/2004 |