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Veröffentlichung Identification and Quantification of Microplastic in Sewage Systems by TED-GC-MS(2019) Altmann, Korinna; Goedecke, Caroline; Bannick, Claus GerhardThe number of publications reporting the amount of microplastic (MP) all over the world increased rapidly. Methods used so far are very time consuming and not able to provide information on total contents. As harmonised sampling, sample preparation and analysis strategies are missing different studies can hardly be compared and quantitative data, including identification and mass contents of the polymers found, are missing. This leads to a lack of comprehensive understanding of MP occurrence, source and entry pathways into the environment. We developed a method, Thermal Extraction/Desorption-Gaschromatography-Massspectrometry, as a fast screening method for MP analysis. Solid residues of water samples are heated up to 600 C under a N2 atmosphere without any sample preparation. The collected decomposition gases are separated in a gas chromatography system and detected in a mass spectrometer. Mass contents of the identified polymers can be calculated. In this presentation we will show first results from the influent of the wastewater treatment plant Kaiserslautern (Germany) and its combined sewage system as possibly entry pathway. In order to determine the relevance of wastewater split streams analysis of grey water will be conducted. Samples are fractionally filtered by a sieve cascade with mesh sizes of 500, 100, 50 Ìm. Quelle: https://opus4.kobv.de/Veröffentlichung Microplastic analysis using chemical extraction followed by LC-UV analysis: a straightforward approach to determine PET content in environmental samples(2020) Müller, Axel; Goedecke, Caroline; Eisentraut, Paul; Braun, UlrikeBackground The ubiquitous occurrence of microplastic particles in marine and aquatic ecosystems was intensively investigated in the past decade. However, we know less about the presence, fate, and input paths of microplastic in terrestrial ecosystems. A possible entry path for microplastic into terrestrial ecosystems is the agricultural application of sewage sludge and solid bio-waste as fertilizers. Microplastic contained in sewage sludge also includes polyethylene terephthalate (PET), which could originate as fiber from textile products or as a fragment from packaging products (foils, bottles, etc.). Information about microplastic content in such environmental samples is limited yet, as most of the used analytical methods are very time-consuming, regarding sample preparation and detection, require sophisticated analytical tools and eventually need high user knowledge. Results Here, we present a simple, specific tool for the analysis of PET microplastic particles based on alkaline extraction of PET from the environmental matrix and subsequent determination of the monomers, terephthalic acid, using liquid chromatography with UV detection (LC-UV). The applicability of the method is shown for different types of PET in several soil-related, terrestrial environmental samples, e.g., soil, sediment, compost, fermentation residues, but also sewage sludge, suspended particles from urban water management systems, and indoor dust. Recoveries for model samples are between 94.5 and 107.1%. Limit of determination and limit of quantification are absolute masses of 0.031 and 0.121 mg PET, respectively. In order to verify the measured mass contents of the environmental samples, a method comparison with thermal extraction-desorption-gas chromatography-mass spectrometry (TED-GC/MS) was conducted. Both methods deliver similar results and corroborated each other. PET mass contents in environmental samples range from values below LOQ in agriculture soil up to 57,000 mg kg-1 in dust samples. Conclusions We demonstrate the potential of an integral method based on chemical extraction for the determination of PET mass contents in solid environmental samples. The method was successfully applied to various matrices and may serve as an analytical tool for further investigations of PET-based microplastic in terrestrial ecosystems. © The Author(s) 2020Veröffentlichung Identification of microplastic pathways within a typical European urban wastewater(2022) Altmann, Korinna; Goedecke, Caroline; Bannick, Claus-Gerhard; Braun, Ulriken recent years, thermoextraction/desorption-gas chromatography/mass spec-trometry (TED-GC/MS) has been developed as a rapid detection method for thedetermination of microplastics (MP) mass contents in numerous environmen-tally relevant matrices and, in particular, for the measurement of polymers inwater samples without time-consuming sample preparation. The TED-GC/MSmethod was applied to investigate a typical European municipal wastewatersystem for possible MP masses. Such investigations are important in view of therecent revision of the Urban WastewaterTreatment Directive. Four differentrepresentative sampling sites were selected: greywater (domestic wastewaterwithout toilet), combined sewer, andinfluent and effluent of a wastewatertreatment plant (WWTP). All samples were collected by fractional filtration.Filtration was carried out over mesh sizes of 500, 100, 50, and in some cases,5 ÎÌm. Polyethylene (PE), polypropylene (PP), and polystyrene (PS) weredetected in all samples, with the PE fraction dominating in all cases. Styrene-butadiene rubber which serves as an indication of tire abrasion, was only foundin the influent of the WWTP. The highest MP mass contents were found in thecombined sewer, so MP can become a source of pollution during heavy rainevents when the capacity limits of the effluent are reached, and the pollutedeffluent is released uncontrolled into the environment. Based on the studies,MP retention from the WWTP could be estimated to be approximately 96%.Few trends in polymer type or mass contents were detected within the differentfractions of the samples or when comparing samples to each other. © 2023 The Authors.Applied Researchpublished by Wiley-VCH GmbH.