Do complex matrices modify the sorptive properties of polydimethylsiloxane (PDMS) for non-polar organic chemicals?
2010 (English)In: Journal of Chromatography A, ISSN 0021-9673, E-ISSN 1873-3778, Vol. 1217, no 29, 4765-4770 p.Article in journal (Refereed) Published
The partitioning of non-polar analytes into the silicone polydimethylsiloxane (PDMS) is the basis for many analytical approaches such as solid phase microextraction (SPME), stir bar sorptive extraction (SBSE) and environmental passive sampling. Recently, the methods have been applied to increasingly complex sample matrices. The present work investigated the possible effect of complex matrices on the sorptive properties of PDMS. First, SPME fibers with a 30 mu m PDMS coating were immersed in 15 different matrices, including sediment, suspensions of soil and humic substances, mayonnaise, meat, fish, olive oil and fish oil. Second, the surface of the fibers was wiped clean, and together with matrix-free control fibers, they were exposed via headspace to 7 non-polar halogenated organic chemicals in spiked olive oil. The fibers were then solvent-extracted, analyzed, and the ratios of the mean concentrations in the matrix-immersed fibers to the control fibers were determined for all matrices. These ratios ranged from 92% to 112% for the four analytes with the highest analytical precision (i.e. polychlorinated biphenyls (PCBs) 3, 28, 52 and brominated diphenyl ether (BDE) 3), and they ranged from 74% to 133% for the other three compounds (i.e. PCBs 101.105 and gamma-hexachlorocyclohexane (HCH)). We conclude that, for non-polar, hydrophobic chemicals, the sorptive properties of the PDMS were not modified by the diverse investigated media and consequently that PDMS is suited for sampling of these analytes even in highly complex matrices.
Place, publisher, year, edition, pages
2010. Vol. 1217, no 29, 4765-4770 p.
Matrix effects, Equilibrium sampling devices(ESD), Polychlorinated biphenyls (PCBs), Passive dosing, Silicone (polydimethylsiloxane, PDMS), Matrix-SPME
Other Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:su:diva-49200DOI: 10.1016/j.chroma.2010.05.046ISI: 000279782400002OAI: oai:DiVA.org:su-49200DiVA: diva2:377067
authorCount :22010-12-132010-12-132010-12-13Bibliographically approved