Xiangbao LongRoongrat ChomchoeiPiotr GałaElo Harald HansenDanmarks Tekniske UniversitetMahidol UniversityPolitechnika Poznanska2018-07-242018-07-242004-10-11Analytica Chimica Acta. Vol.523, No.2 (2004), 279-286000326702-s2.0-4544330176https://repository.li.mahidol.ac.th/handle/20.500.14594/21142The operational characteristics of a novel poly(tetrafluoroethylene) (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 μg l-1versus 0.2956 μg l-1per 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-1versus 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. © 2004 Elsevier B.V. All rights reserved.Mahidol UniversityBiochemistry, Genetics and Molecular BiologyChemistryEnvironmental ScienceArticleSCOPUS10.1016/j.aca.2004.07.025