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Determination of dioxins in Cretaceous strata from the South of Sweden.: Can the environmental anthropogenic pollutant dioxin be of natural origin ?
Örebro University, School of Science and Technology, Örebro University, Sweden. (Analytical environmental chemistry)
2012 (English)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Eleven sediment samples from different geological layers and four fossils from the South of Sweden were collected and estimated to be 80 million years old (approximately late of Cretaceous period). The samples were analyzed for polychlorinated dibenzo-p dioxins (PCDD/Fs) to investigate whether these samples are likely to contain dioxins from a natural formation. For over thirty years, the scientific community has discussed the possibility of a natural formation of dioxins. Several hypothesis have been put forward, but often rejected by the evidence of a source of anthropogenic pollution in the samples.

In order to answer this issue, two types of analyses have been performed : high resolution gas chromatography-high resolution mass spectrometry (HRGC/HRMS) and elemental analyzer-isotopic ratio mass spectrometry (EA-IRMS). HRGC/HRMS provides information about the source of dioxins comparing the distribution of all PCDD/Fs to experimental isotopic patterns from past publications. δ13C of organic carbon gives information about the nature of carbon present in soils and can be helpful to trace paleoclimates.

Place, publisher, year, edition, pages
2012. , 47 p.
Örebro Studies in Chemistry, ISSN 1651-4270
Keyword [en]
old clay layers, octachlorodibenzo-p-dioxin, high resolution gas chromatography-high resolution mass spectrometry, analyzer-isotopic ratio mass spectrometry, isotopic dilution.  
National Category
Engineering and Technology
URN: urn:nbn:se:oru:diva-25916ISRN: ORU-NAT/KEM-AG-2012/0002--SEOAI: diva2:555396
Subject / course
Physics, Chemistry, Mathematics
Available from: 2012-11-12 Created: 2012-09-19 Last updated: 2012-11-12Bibliographically approved

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