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2 Polish Journal of Environmental Studies

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Determining PCBs in fish and sediment samples related to intercomparison studies

100%

Filipkowska A.

nr 5

This paper reports on the analysis of polychlorinated biphenyls (PCBs) in selected intercomparison materials (IAEA-435 (tuna) and IAEA-159 (sediment)), and presents the author’s results against the background of results accepted by the organizer of the intercomparison studies, i.e. the Marine Environment Laboratories of the International Atomic Energy Agency in Monaco. The samples were extracted with a mixture of acetone/hexane (tuna) or acetonitrile (sediment) by sonication, cleaned up using micro-columns packed with different materials (e.g. silica gel, florisil, copper), and analyzed by GC-ECD. The difficulties of PCB determination are indicated and the differences between the analyses of low- and high-molecular-weight PCBs are emphasized.

Preparation of soil and sediment samples for determination of organometallic compounds

67%

Dubiella-Jackowska A. , Wasik A. , Przyjazny A. , Namiesnik J.

nr 2

Organometallic compounds are widely used in almost all sectors of industry. As a result of emissions from natural and anthropogenic sources they are released to the environment, where they undergo a variety of conversions and interactions. Some organometallic compounds exhibit high toxicity. Organometallic compounds of mercury, tin, lead, selenium and arsenic are among the most common and hazardous compounds. Based on literature dealing with the occurrence and methods of determination of selected organometallic compounds of mercury, tin, lead, selenium and arsenic, we describe their sources, uses and the mechanism of toxicity. Fundamental problems associated with speciation analysis are discussed and the basic steps of analytical procedure used for the determination of organometallic compounds of Hg, Sn, Pb, Se, and As in soil and bottom sediments, including sample collection, preservation, storage, extraction, separation and determination, are characterized.