Selective supercritical fluid extraction to estimate the fraction of PCB that is bioavailable to a benthic organism in a naturally contaminated sediment
(2003) In Chemosphere 53(8). p.1049-1052- Abstract
- Selective supercritical fluid extraction (SFE) at 40 °C, 120 bar and 60 min was utilised as a means to estimate the bioavailable fraction of PCBs to chironomid larvae in a naturally contaminated limnic sediment. This extraction methodology removed about 50% of the PCBs from the sediment. According to the equilibrium partitioning theory, organisms in that sediment should decrease their uptake from the sediment to the same extent, biota-to-sediment accumulation factors (BSAFs) thus remaining constant. Surprisingly, the BSAFs for 11 PCB congeners decreased some 40% for the selectively extracted sediment as compared to BSAFs for organisms dwelling in untreated sediment. The results were statistically significant at the 0.001 level using a... (More)
- Selective supercritical fluid extraction (SFE) at 40 °C, 120 bar and 60 min was utilised as a means to estimate the bioavailable fraction of PCBs to chironomid larvae in a naturally contaminated limnic sediment. This extraction methodology removed about 50% of the PCBs from the sediment. According to the equilibrium partitioning theory, organisms in that sediment should decrease their uptake from the sediment to the same extent, biota-to-sediment accumulation factors (BSAFs) thus remaining constant. Surprisingly, the BSAFs for 11 PCB congeners decreased some 40% for the selectively extracted sediment as compared to BSAFs for organisms dwelling in untreated sediment. The results were statistically significant at the 0.001 level using a paired t-test. This can only be interpreted so that selective SFE removed easily available PCBs preferentially, leaving more tightly bound PCBs behind. Hence, by fine-tuning extraction conditions, this methodology might be used to estimate bioavailable fractions by chemical means. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/128947
- author
- Nilsson, Tobias LU ; Sporring, Sune LU and Björklund, Erland LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Bioavailability, PCB, SFE, Sediment
- in
- Chemosphere
- volume
- 53
- issue
- 8
- pages
- 1049 - 1052
- publisher
- Elsevier
- external identifiers
-
- wos:000186102400029
- pmid:14505728
- scopus:0642279686
- ISSN
- 1879-1298
- DOI
- 10.1016/S0045-6535(03)00615-5
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Analytical Chemistry (S/LTH) (011001004)
- id
- 9a621c7a-cecf-4fe3-ae33-5ef198f4569a (old id 128947)
- date added to LUP
- 2016-04-01 12:04:03
- date last changed
- 2022-01-26 22:18:31
@article{9a621c7a-cecf-4fe3-ae33-5ef198f4569a, abstract = {{Selective supercritical fluid extraction (SFE) at 40 °C, 120 bar and 60 min was utilised as a means to estimate the bioavailable fraction of PCBs to chironomid larvae in a naturally contaminated limnic sediment. This extraction methodology removed about 50% of the PCBs from the sediment. According to the equilibrium partitioning theory, organisms in that sediment should decrease their uptake from the sediment to the same extent, biota-to-sediment accumulation factors (BSAFs) thus remaining constant. Surprisingly, the BSAFs for 11 PCB congeners decreased some 40% for the selectively extracted sediment as compared to BSAFs for organisms dwelling in untreated sediment. The results were statistically significant at the 0.001 level using a paired t-test. This can only be interpreted so that selective SFE removed easily available PCBs preferentially, leaving more tightly bound PCBs behind. Hence, by fine-tuning extraction conditions, this methodology might be used to estimate bioavailable fractions by chemical means.}}, author = {{Nilsson, Tobias and Sporring, Sune and Björklund, Erland}}, issn = {{1879-1298}}, keywords = {{Bioavailability; PCB; SFE; Sediment}}, language = {{eng}}, number = {{8}}, pages = {{1049--1052}}, publisher = {{Elsevier}}, series = {{Chemosphere}}, title = {{Selective supercritical fluid extraction to estimate the fraction of PCB that is bioavailable to a benthic organism in a naturally contaminated sediment}}, url = {{http://dx.doi.org/10.1016/S0045-6535(03)00615-5}}, doi = {{10.1016/S0045-6535(03)00615-5}}, volume = {{53}}, year = {{2003}}, }