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(47-02) Isomer-Specific Analysis of PCN and Dioxin-Like Compounds in DELOR : Technical PCB Mixtures from the Former Czechoslovakia. Taniyasu, Sachi*,1, Kannan, Kurunthachalam2, Holoubek, Ivan2, Horii, Yuichi3, Yamashita, Nobuyoshi1, 1 National Institute of Advanced Industrial Science and Technology, JAPAN, 16-1 Onogawa, Tsukuba, Ibaraki2 Michigan State University, USA3 RECETOX-TOCOEN, CZECH ABSTRACT- Because of their physical and chemical properties, large amounts of polychlorinated biphenyl (PCB) preparations have been used in different technical applications ( e.g. transformer and thermal paper). Although the usage of PCBs was banned more than thirty years ago, significant amounts of them are still detectable in almost all environments. Highest levels of PCB contamination have been found in samples collected from Eastern European countries in the 1990s and it is believed that PCBs were used as lubricants for mining equipment until recently. This, however, is not only a regional problem but also a global one, due to "trans-boundary pollution". In this study, we carried out isomer-specific analysis of special PCB preparations (Delor103, 104, 105 and 106) from the former Czechoslovakia under an international collaboration among Czech, USA and Japan. The contamination of highly toxic impurities, such as polychlorinated naphthalenes (PCNs), polychlorinated dibenzofurans and coplanar PCBs were also determined using a double-column HPLC and HRGC/HRMS. PCNs were found in Delor at concentrations of up to several hundred micrograms per gram and these were lower than those in Sovol (the former USSR), Chlorofen (Poland) and Phenochlor (France), but similar to Kanechlor (Japan) and Aroclor (USA). 2,3,7,8-TCDD equivalents of PCNs in Delor105 and Delor106 were comparable to that in Sovol and Phenochlor, but higher than in Kanechlor and Aroclor. Isomer composition in Delor103, Delor104, Delor105 and Delor106 correspond to Aroclor1016, Aroclor1232, Aroclor1248 and Aroclor1254 (Sovol), respectively. Inventory of PCN from PCB mixture, Delor, will be discussed in view of global pollution. Key words: Delor, PCB, PCN, PCDD |
