Comparison of accelerated solvent extraction and soxhlet extraction for the determination of PCBs in Baltic Sea sediments

Article Abstract:

This study was used to evaluate the effectiveness of the extraction conditions proposed in ASE U.S. EPA Method 3545, specifically for the extraction of polychlorinated biphenyls in sediments from the Baltic Sea. The article is broken down into an introduction, a discussion of the experiment and a discussion of the results.

United States, Science & research, Environmental aspects, Pollution, Chemical industry, Marine sediments, Baltic Sea, Extraction (Chemistry)

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Separation for subsequent analysis of PCBs, PCDD/Fs, and PAHs according to aromaticity and planarity using a two-dimensional HPLC system

Article Abstract:

A rapid and efficacious high performance liquid chromatography separation method is developed for the subsequent analysis of polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins and dibenzofurans, polycyclic aromatic hydrocarbons and related compounds in complex environmental matrices. The method uses a coupled column system and offers five well-defined fractions ready for direct analysis on gas chromatography/mass spectrometry. The separation lasts for less than 40 minutes and consumes less than 70 ml. of solvents.

Analytical Laboratory Instrument Manufacturing, Analytical instruments, Aromatic Hydrocarbons, Liquid Chromatographs, Analysis, Dibenzofurans, Polycyclic aromatic hydrocarbons, Separation (Technology), High performance liquid chromatography

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Significance of bacteria in marine waters for the distribution of hydrophobic organic contaminants

Article Abstract:

Concentrations of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in the same order as or higher than the larger particulate fraction of 2-90 (micro)m were filtered in the northern Baltic Sea at two seasonal periods. Concentrations of the sum of PCBs and PAHs for the larger size fraction were highest in summer (June) and lowest during autumn (November). For the bacterial fraction, the opposite was true as the highest concentrations of the the sum of PCBs and PAHs were found during autumn while the lowest were observed during summer. These findings reveal the significance of heterotrophes for the distribution and dynamics of hydrophobic organic contaminants in marine waters.

Research, Bacteria, Heterotrophic, Heterotrophic bacteria, Marine bacteria, Food chains (Ecology), Food chains, Polycyclic aromatic compounds

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