Surface characterization of commercial fibers for solid-phase microextraction and related problems in their application |
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| Authors: | C Haberhauer-Troyer M Crnoja E Rosenberg M Grasserbauer |
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| Institution: | (1) Institute of Analytical Chemistry, Vienna University of Technology, Getreidemarkt 9/151, A-1060 Vienna, Austria, AT |
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| Abstract: | The surfaces of commercially available polydimethylsiloxane (PDMS) and Carboxen-PDMS fibers for solid-phase microextraction
(SPME) were investigated by optical and electron microscopy. Damage to the coating as well as contamination of new fibers
and a highly variable number of pores in Carboxen-PDMS coatings were observed. Together with the contamination of the fibers
during their use with metallic particles originating from the SPME fiber holder they are possible explanations for the problems
encountered in the analysis of organolead, organotin and organosulfur compounds, such as artifact formation and low repeatability.
Received: 2 August 1999 / Revised: 5 October 1999 / Accepted: 6 October 1999 |
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