Relationship between dietary exposure and serum perfluorochemical (PFC) levels--a case study.

Daily dietary intake of perfluorinated chemicals (PFCs) in relation to serum levels was assessed by determination of nine PFCs including perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in matched daily diet duplicates and serum samples. Diet and serum were collected in year 2004 from 20 women in Osaka and Miyagi, Japan. Only PFOS and PFOA were detected in the diet samples and no significant difference between cities was seen.

Development of new-type rapid analysis technology of polychlorinated biphenyls by using liquid chromatographic clean-up material (polyvinyl alcohol gel).

We developed a new-type rapid polychlorinated biphenyl (PCB) analysis technology on the basis of a liquid chromatographic clean-up system combined with a large-volume injection GC-LRMS. Among 18 kinds of materials such as polymer gels, normal-phase silica gels, reversed-phase silica gels, carbon material and ion-exchange material, polyvinyl alcohol (PVA) gel and poly (hydroxylmethacrylate) gel were found to give rather good separation performance for insulating oil. Especially, PVA gel was confirmed to be the most suitable for rapid PCB analysis because of its least required quantity of fraction liquid as well as the highest resolution.

Perfluorinated compounds in river water, river sediment, market fish, and wildlife samples from Japan.

Perfluorinated organic compounds (PFCs) such as PFOS, PFOA, PFBS, PFHxS, PFOSA and PFDoA were determined in river water, river sediment, liver of market fish and liver of wildlife samples from Japan. Concentrations of PFOA and PFOS in water samples were 7.9-110 and <5.

Impact of FEBRA (fermented brown rice with Aspergillus oryzae) intake and concentrations of PCDDs, PCDFs and PCBs in blood of humans from Japan.

Impact of FEBRA (fermented brown rice with Aspergillus oryzae, a rich dietary fiber) intake on the concentrations of polychlorinated-biphenyls (PCBs), -dioxin-like polychlorinated biphenyls (DLPCBs), -dibenzo-p-dioxins (PCDDs), and -dibenzofurans (PCDFs) in blood of nine married Japanese were studied for 2 years. Concentrations of total PCBs (average+/-standard deviation) were greater 326,000+/-263,000 and 207,000+/-89,000 in FEBRA-intake and non-FEBRA-intake groups, respectively, on pg/g lipid (from now onwards data expressed on pg/g lipid). DLPCBs were second major contaminants 94,000+/-77,000 and 60,000+/-28,000, orderly in FEBRA-intake and non-FEBRA-intake groups.

Impact of fermented brown rice with Aspergillus oryzae (FEBRA) intake and concentrations of polybrominated diphenylethers (PBDEs) in blood of humans from Japan.

The isotope dilution technique was applied for the analysis of new polybrominated diphenylethers (PBDEs) calibration standard (both labeled and non-labeled) using high-resolution gas chromatography-high-resolution mass spectrometry (HRGC-HRMS). The relative response factor (RRF) and relative standard deviation (RSD) for new calibration standard in Finnigan Thermo Electron (MAT-95XL) and Micromass (Autospec Ultima) were more or less identical with mean RRF (0.9882), RSD (0.

Formation of polychlorinated naphthalenes, dibenzo-p-dioxins, dibenzofurans, biphenyls, and organochlorine pesticides in thermal processes and their occurrence in ambient air.

Mono- through octachlorinated naphthalenes (PCNs) were measured in start-up, steady operation, and shutdown of machinery operation flue gas and fly ash generated during different stages of MSWI and other incineration thermal processes. Besides, electroprecipitator fly ash (EP-ash) was dechlorinated using the Hagenmeier process and analyzed for congener profiles. In addition to PCNs, polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), biphenyls (PCBs), and major organochlorine pesticides were determined in ambient air samples from three different sites of western Japan in the summer and winter of 1992.