Pressurized liquid extraction using water/isopropanol coupled with solid-phase extraction cleanup for semivolatile organic compounds, polycyclic aromatic hydrocarbons (PAH), and alkylated PAH homolog groups in sediment
| Autor: | Mark R. Burkhardt, Mary C. Olson, Teresa L. Burbank, Jana L. Iverson, Steven D. Zaugg |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
chemistry.chemical_classification
Chromatography Extraction (chemistry) Polycyclic aromatic hydrocarbon Biochemistry Analytical Chemistry chemistry.chemical_compound Hydrocarbon chemistry Liquid–liquid extraction Environmental chemistry Environmental Chemistry Sample preparation Solid phase extraction Gas chromatography Spectroscopy Naphthalene |
| Zdroj: | Analytica Chimica Acta. 549:104-116 |
| ISSN: | 0003-2670 |
| DOI: | 10.1016/j.aca.2005.06.032 |
| Popis: | Polycyclic aromatic hydrocarbons (PAH) are recognized as environmentally relevant for their potential adverse effects on human and ecosystem health. This paper describes a method to determine the distribution of PAH and alkylated homolog groups in sediment samples. Pressurized liquid extraction (PLE), coupled with solid-phase extraction (SPE) cleanup, was developed to decrease sample preparation time, to reduce solvent consumption, and to minimize background interferences for full-scan GC–MS analysis. Recoveries from spiked Ottawa sand, environmental stream sediment, and commercially available topsoil, fortified at 1.5–15 μg per compound, averaged 94.6 ± 7.8%, 90.7 ± 5.8% and 92.8 ± 12.8%, respectively. Initial method detection limits for single-component compounds ranged from 20 to 302 μg/kg, based on 25 g samples. Results from 28 environmental sediment samples, excluding homologs, show 35 of 41 compounds (85.4%) were detected in at least one sample with concentrations ranging from 20 to 100,000 μg/kg. The most frequently detected compound, 2,6-dimethylnaphthalene, was detected in 23 of the 28 (82%) environmental samples with a concentration ranging from 15 to 907 μg/kg. The results from the 28 environmental sediment samples for the homolog series showed that 27 of 28 (96%) samples had at least one homolog series present at concentrations ranging from 20 to 89,000 μg/kg. The most frequently detected homolog series, C2-alkylated naphthalene, was detected in 26 of the 28 (93%) environmental samples with a concentration ranging from 25 to 3900 μg/kg. Results for a standard reference material using dichloromethane Soxhlet-based extraction also are compared. |
| Databáze: | OpenAIRE |
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