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dc.contributor.authorJong APJM de
dc.contributor.authorHeeft E van der
dc.date.accessioned2012-12-12T14:35:39Z
dc.date.available2012-12-12T14:35:39Z
dc.date.issued1993-05-31
dc.identifier770501001
dc.identifier.urihttp://hdl.handle.net/10029/256792
dc.description.abstractAbstract niet beschikbaar
dc.description.abstractThis report describes the results of the analysis of brominated and mixed halogenated (Br/Cl) dibenzo-p-dioxins and furans (DD/Fs) in the stack gas of an industrial process in which significant amounts of flame retardants are being used. Stack gas samples have been collected prior and following the after burner gas cleaning facility. PCDD/F levels, expressed in 2,3,7,8 TCDD toxic equivalents (TEQ), as analysed by TNO were 0.20 ng TEQ/m3 ind (before) and 0.05 ng TEQ/m3 ind (after), respectively. Using both negative chemical ionization (NCI) and electron impact (EI)-mass spectrometry, several brominated compounds were found and tentatively identified as bromobiphenyls (BrBs) and bromochloropolyaromatic hydrocarbons (Br/Cl-PAHs). In addition, some 28 monobromo-polychlorinated (Br/Cln, n=3-7) DD/Fs could be demonstrated in low concentrations in both samples. Determination of their isomeric structure failed due to low sample sizes. Estimation of their TEQ value was performed on the basis of the response ratio for monobroom-heptachloor DD/Fs (Br-Cl7-DD/F) and quantified polychloro analogues (Cl8D/F). Assuming a random distribution of the Bratom, and an estimated relative occurrence of Br to Cl of 1:1000 per substituent, the additional BrCln-DD/F TEQ value was estimated to be not greater than approximately 1% of the corresponding PSDD/F-TEQ value.
dc.description.sponsorshipDGM/A
dc.format.extent21 p
dc.language.isonl
dc.relation.ispartofRIVM Rapport 770501001
dc.relation.urlhttp://www.rivm.nl/bibliotheek/rapporten/770501001.html
dc.subject17nl
dc.titleOnderzoek naar het voorkomen van gemengd broom/chloor dibenzo-p-dioxinen en furanen in emissies van een industrieel procesnl
dc.title.alternative[Determination of the appearance of mixed halogenated dibenzo-p-dioxins and furans in the stack gas of an industrial process.]en
dc.typeReport
dc.date.updated2012-12-12T14:35:40Z
html.description.abstractAbstract niet beschikbaar
html.description.abstractThis report describes the results of the analysis of brominated and mixed halogenated (Br/Cl) dibenzo-p-dioxins and furans (DD/Fs) in the stack gas of an industrial process in which significant amounts of flame retardants are being used. Stack gas samples have been collected prior and following the after burner gas cleaning facility. PCDD/F levels, expressed in 2,3,7,8 TCDD toxic equivalents (TEQ), as analysed by TNO were 0.20 ng TEQ/m3 ind (before) and 0.05 ng TEQ/m3 ind (after), respectively. Using both negative chemical ionization (NCI) and electron impact (EI)-mass spectrometry, several brominated compounds were found and tentatively identified as bromobiphenyls (BrBs) and bromochloropolyaromatic hydrocarbons (Br/Cl-PAHs). In addition, some 28 monobromo-polychlorinated (Br/Cln, n=3-7) DD/Fs could be demonstrated in low concentrations in both samples. Determination of their isomeric structure failed due to low sample sizes. Estimation of their TEQ value was performed on the basis of the response ratio for monobroom-heptachloor DD/Fs (Br-Cl7-DD/F) and quantified polychloro analogues (Cl8D/F). Assuming a random distribution of the Bratom, and an estimated relative occurrence of Br to Cl of 1:1000 per substituent, the additional BrCln-DD/F TEQ value was estimated to be not greater than approximately 1% of the corresponding PSDD/F-TEQ value.


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