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Homogeneity of dispersed brominated flame retardants (HBCD) in polystyrene by LA-ICP-MS and XRF

  • Polybrominated Flame retardants (PBFR) are of concern as emerging pollutants resulting from plastic waste, which set them free because these additives are not chemically bonded to the polymer. For this reason we fortunately use the laser ablation inductive coupled mass spectrometry (LA-ICP-MS) to verify the amount of 1,2,5,6,9,10-Hexabromocyclododecane (HBCD) in polystyrene (PS) resp polybrominated diphenylether (BDE-209) in polypropylene (PP). Results from X-ray fluorescence spectroscopy (RFA) are compared with those from LA-ICP-MS for studying the homogeneity of PBFR such as BDE-209 (0.1% wt. in PP) or HBCD (1% wt. in PS). RFA is well suited for the reason that it is a rapid, non-destructive and sensitive method. We also use the LA-ICP-MS as reference method for quantification of the content of PBFR herein and by measurement of ABS (acrylonitrile–butadiene–styrene, ABS) and correlate these data with RFA measurements. The necessity for the proof of homogeneity of BFR additivesPolybrominated Flame retardants (PBFR) are of concern as emerging pollutants resulting from plastic waste, which set them free because these additives are not chemically bonded to the polymer. For this reason we fortunately use the laser ablation inductive coupled mass spectrometry (LA-ICP-MS) to verify the amount of 1,2,5,6,9,10-Hexabromocyclododecane (HBCD) in polystyrene (PS) resp polybrominated diphenylether (BDE-209) in polypropylene (PP). Results from X-ray fluorescence spectroscopy (RFA) are compared with those from LA-ICP-MS for studying the homogeneity of PBFR such as BDE-209 (0.1% wt. in PP) or HBCD (1% wt. in PS). RFA is well suited for the reason that it is a rapid, non-destructive and sensitive method. We also use the LA-ICP-MS as reference method for quantification of the content of PBFR herein and by measurement of ABS (acrylonitrile–butadiene–styrene, ABS) and correlate these data with RFA measurements. The necessity for the proof of homogeneity of BFR additives resulting from the use of these samples for weathering studies we perform to discover unknown transformation process and to get a certified reference method. For studying the homogeneity partition of BFR in PS or PP, we need to estimate the relation V/N (V=ablated volume, N=molar amount) for any studied area, which is in case of a homogenous partition for every area identical. To measure the ablated volume we applied the white light interference microscopy from which we derived the theoretical amount of ablated flame retardant. In correlation to an ablated CRM we get the molar amount of ablated BFR. From the counts (RFA) resp. the ratio of peak area of the bromine isotope we derive the concentration of BFR in ablated PS resp. PP. Another approach uses the applied external standard addition using RFA scanning. A cylindrical probe of defined geometry, corresponding to a defined amount of BFR, was removed from PS. Into this hole was added a solution of BFR of defined concentration and letting dried. RFA scanning of background and the hole gives a direct confirmation of the included amount of BFR herein. According to ISO 13528 samples for proficiency tests were acknowledged as homogenous if the criteria for homogeneity ss<0.3sigma were fulfilled.zeige mehrzeige weniger

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Metadaten
Autor*innen:Hassan Iznaguen
Koautor*innen:Markus Ostermann, Heike Traub, Christian Piechotta
Dokumenttyp:Posterpräsentation
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2017
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Sanitär- und Kommunaltechnik; Umwelttechnik
Freie Schlagwörter:LA-ICP-MS; PBFR; RFA
Veranstaltung:ANAKON 2017
Veranstaltungsort:Tübingen, Germany
Beginndatum der Veranstaltung:03.04.2017
Enddatum der Veranstaltung:06.04.2017
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:15.05.2017
Referierte Publikation:Nein
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