soxhlet system Articles

  • Determination of PBDEs in Sediment Samples using Pressurized Solvent Extraction and Automated Soxhlet Extraction

    The efficiency of pressurized solvent extraction (PSE) was investigated by comparing PSE with automated Soxhlet extraction. Sediment samples containing polybrominated diphenylethers (PBDEs) were processed in the SpeedExtractor E-914 for PSE and the Extraction System B-811 for automated Soxhlet extraction. Quantification of PBDEs was performed by GC-MS. This study shows that both techniques are ...

    By BÜCHI Labortechnik AG

  • Polymer coatings on yarns

    Determination of polymer coatings on yarns using the Extraction System B-811 Yarns are coated with different polymers to optimize or change their individual properties. This Application Note presents effective automated Soxhlet extraction methods for the determination of the amount of polymer coatings on yarn samples. Depending on the kind of polymer coating different methods are ...

    By BÜCHI Labortechnik AG

  • Determination of brominated flame retardants in Jukskei River catchment area in Gauteng, South Africa

    Brominated flame retardants (BFRs) are considered to be environmental pollutants due to their toxicity, persistence and ubiquity in the environment. Little information is known about the presence of brominated flame retardants in South Africa's water systems. Therefore, this study examined and compared different extraction methods (liquid–liquid (LL) vs. solid phase (SP) for water, Soxhlet ...

    By IWA Publishing

  • Trace Analysis of PAHs using EPA methods 3541, 3545 and 8100

    The Extraction System B-811 and the Syncore Analyst parallel concentrator from Buchi as well as the Pressurized Solvent Extractor from Applied Separations were evaluated for the pretreatment of samples containing PAHs. Recoveries of extraction and subsequent concentration using acetone-n-hexane (1+1) were 70-95% for 2 ring and 90-100% for less volatile 3-5 ring PAHs. A good precision (95% ...

    By BÜCHI Labortechnik AG

  • Analysis of PCBs in emission samples: non ortho, mono-ortho and homolog totals by level of chlorination

    IntroductionPolychlorinated biphenyls (PCBs) are one of the most widespread persistent organic pollutants, identified in every component of the global ecosystem. A production of approximately 2 * 10 9 Kg technical PCB occurred form 1930 to the late 1970 1 and the total amount released into the environment is estimated in 370. 000 2 tonnes. Twelve of the possible 209 PCBs are non- and mono-ortho ...

    By Monitoring Systems GmbH

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