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Development and application of a solidphase extraction method for simultaneousdetermination of PAHs, oxy-PAHs andazaarenes in water samples
Umeå University, Faculty of Science and Technology, Department of Chemistry.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this study, a solid phase extraction (SPE) method was developed that can be used to

extract a wide range of polycyclic aromatic compounds (PACs), including polycyclic

aromatic hydrocarbons (PAHs), oxygenated PAHs (oxy-PAHs) and azaarenes, from

water samples. Three commercially available SPE materials, i.e. Oasis HLB,

ISOLUTE C2/C18 (EC) and ISOLUTE PAH, were tested for their capability to

accomplish the extraction, and two were chosen for further optimization. Several

different combinations of solvents were tested. Experiments were performed on both

spiked and real contaminated water samples. The ISOLUTE C2/C18 (EC) performed

best on spiked samples for most of the target PACs while the Oasis HLB material was

more suitable for real samples. The results from both materials agreed well with the

results obtained with a traditional method based on liquid-liquid extraction (LLE)

followed by silica gel fractionation. The final method was based on Oasis HLB eluted

with dichloromethane/ methanol (7:3) using a flow rate not exceeding 2ml/min. This

method was applied on ten real samples collected from a water treatment plant

operating at a creosote contaminated wood preservation site in order to exam how

much the dissolved concentrations of target PACs varied in the plant. The SPE

method is faster and consumes much less solvent than a method based on LLE for

instance and it is also less labor intensive. The SPE method is therefore favorable

during larger studies on PACs contamination in aqueous environments.

Place, publisher, year, edition, pages
National Category
Chemical Sciences
URN: urn:nbn:se:umu:diva-56332OAI: diva2:533668
Physics, Chemistry, Mathematics
Available from: 2012-06-21 Created: 2012-06-14 Last updated: 2012-06-21Bibliographically approved

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