Comparison of the uptake of dioxin-like compounds by caged channel catfish and semipermeable membrane devices in the Saginaw River, Michigan

Article Abstract:

The reproductive problems arising in a variety of fish-eating mammals and birds in Saginaw River, MI are conjectured to have been caused by high concentrations of planar, halogenated hydrocarbons. In order to analyze the the dioxin-like toxicity in the river and to estimate its concentrations, researchers compared resultant data from an experiment using a semipermeable membrane device, an assessment of bioconcentrations in co-exposed, caged channel catfish, and sediment-based water sampling method.

Research and Development in the Physical, Engineering, and Life Sciences, All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Water Pollution Control R&D, Halogenated Hydrocarbons, Research, Halocarbons, Pollutants, Water pollution research, Saginaw River

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Automated HPLC fractionation of PCDDs and PCDFs and planar and nonplanar PCBs on C18-dispersed PX-21 carbon

Article Abstract:

Polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and chlorobiphenyl congeners were separated in fractions using a new technique involving HPLC columns with PX-21 activated carbon and an automated HPLC autoinjector-fraction collector. The method was shown to be an effective, cost-effective technique for producing discrete fractions. In addition, the system is shown to be extremely flexible for different applications.

Methods, Fractionation, Fractional distillation

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Use of the semipermeable membrane device as an in situ sampler of waterborne bioavailable PCDD and PCDF residues at sub-parts-per-quadrillion concentrations

Article Abstract:

The levels of contamination of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in Bayou Meto, AR, were measured using semipermeable membrane devices. Gas chromatography/mass spectrometry techniques were used to analyze the samples. There were higher levels of contamination in the downstream sites, agreeing with previous results.

Usage, Ion exchange membranes, Dibenzofurans, Ion-permeable membranes, Organochlorine compounds, Organic chlorine compounds

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