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Fettig, Ina

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2016 - 20173
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Enddatum: 2019 × Anfangsdatum: 2016 ×

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  • Vorschaubild
    Veröffentlichung
    Dioxine und dioxinähnliche PCB in Umwelt und Nahrungsketten
    (2017) Behnke, Anja; Blondzik, Katrin; Böhnhardt, Anna; Bussian, Bernd M.; Dauert, Ute; Fettig, Ina; Gärtner, Philipp; Giese, Evelyn; Juhrich, Kristina; Knetsch, Gerlinde; Konietzka, Rainer; Koschorreck, Jan; Markard, Christiane; Minkos, Andrea; Moriske, Heinz-Jörn; Plickert, Sebastian; Rappolder, Marianne; Schmidt, Simone; Schröter-Kermani, Christa; Utermann, Jens; Deutschland. Umweltbundesamt
    Dioxine und dioxinähnliche polychlorierte Biphenyle (dl-PCB) gehören zu den gefährlichsten Umweltgiften. Obwohl die Dioxin-Emissionen seit 1990 in Deutschland und Europa deutlich verringert und der Einsatz von PCB 1989 verboten wurde, kommen Dioxine und PCB aufgrund ihrer Langlebigkeit noch immer in der Luft, im Boden oder in Gewässersedimenten vor und gelangen so in die Nahrungskette von Tier und Mensch. Um das zu vermeiden, ist es notwendig, alle Quellen aufzuspüren und die Belastungen der Umwelt weiter zu minimieren. Das aktualisierte Hintergrundpapier des Umweltbundesamtes informiert ausführlich über die Zusammenhänge zwischen der Belastung von Umwelt und tierischen Nahrungsmitteln durch Dioxine und dl-PCB - von der Entstehung über den Transfer in die Nahrungsketten bis zu den Wirkungen auf den Menschen. Quelle: https://www.umweltbundesamt.de
  • Vorschaubild nicht verfügbar
    Veröffentlichung
    A novel GC-MS method for the determination and quantification of metformin in surface water
    (2017) Goedecke, Caroline; Fettig, Ina; Piechotta, C.
    Drug therapy for diabetes mellitus has increased significantly in recent years. 1,1-Dimethylbiguanide hydrochloride (metformin) is the most common drug used for the treatment of diabetes. Metformin is not metabolized in the human body and enters the water cycle via sewage. A new gas chromatography-mass spectrometry (GC-MS) method has been developed which enables the quantification of metformin in surface water samples even at low concentrations in the ng L-1 range. A solid phase extraction (SPE) method for the preconcentration of metformin and the internal standard 1-butylbiguanide (buformin) was established, and the method parameters such as the composition and volume of the eluent were optimized. Derivatization of metformin and buformin was obtained by using n-methyl-bis (trifluoroacetamide) (MBTFA). The reaction conditions of the derivatization, such as the reaction temperature and volume of the derivatization agent, were evaluated. The limit of detection (LOD) and limit of quantification (LOQ) were determined to be 3.9 ng L-1 and 12 ng L-1 in surface water samples. Linearity was shown over a concentration range of 10-50 ng L-1. The good performance of the method was demonstrated by comparison with a liquid chromatography tandem mass spectrometry (LC-MS/MS) method. The results indicate that the GC-MS method is a reliable and sensitive alternative for the quantification of metformin in surface water. Quelle: http://pubs.rsc.org
  • Vorschaubild nicht verfügbar
    Veröffentlichung
    Determination of tributyltin in whole water matrices under the European Water Framework Directive
    (2016) Richter, Janine; Fettig, Ina; Philipp, Rosemarie; Jakubowskia, Norbert; Panne, Ulrich; Fisicaro, Paola; Alasonati, Enrica
    Monitoring of water quality is important to control water pollution. Contamination of the aquatic system has a large effect on human health and the environment. Under the European Water Framework Directive (WFD) 2000/60/EC and the related directive on environmental quality standards (EQS) in the field of water policy 2008/105/EC, the need for sensitive reference methods was highlighted. Since tributyltin (TBT) is one of the WFD listed priority substances a method was developed which is capable to qualify and quantify the pollutant at the required low WFD EQS of 0.2 ng L-1 in whole water bodies, i.e. in non-filtered water samples with dissolved organic carbon and suspended particulate matter. Therefore special attention was paid on the interaction of TBT with the suspended particulate matter and humic substances to obtain a complete representation of the pollution in surface waters. Different water samples were investigated varying the content of organic dissolved and suspended matter. Quantification was performed using species-specific isotope dilution (SSID) and gas chromatography with inductively coupled plasma mass spectrometry (GC-ICP-MS). Different sample treatment strategies were evaluated and compared. The process of internal standard addition was investigated and optimized, hence the equilibrium between internal standards and matrix is of primary importance to perform accurate SSID. Samples spiked at EQS level were analyzed with a recovery between 95 and 105 %. Additionally real surface water samples were investigated and the TBT concentration for the whole water body was determined and compared with conventional routine analysis method.Quelle: http://www.sciencedirect.com