Detail of "60145-23-5"

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Analytical method of PBDEs and PCBs from small volume human blood

Analytical method of PBDEs and PCBs from small volume human blood. Fujimine, Yoshinori; Mochizuki, Ayumi; Hirai, Tetsuya; Koizumi, Akio ( Otsuka Pharmaceutical, Tokushima, Japan). Organohalogen Compounds, 66(Dioxin 2004), 81-84 (English) 2004 International Symposium on Halogenated Environmental Organic Pollutants and Persistent Organic Pollutants. CODEN: ORCOEP. ISSN: 1026-4892. 60145-23-5 and 38380-08-4 are cas registry numbers. These chemicals are also mentioned in this article. DOCUMENT TYPE: Journal; (computer optical disk) CA Section: 4 (Toxicology) Section cross-reference(s): 9 The Small Vol. method (S-V method) that uses HRGC/HRMS for the anal. of polychlorinated biphenyls (PCBs) and polybrominated di-Ph ethers (PBDEs) was developed. The SV method for PCB can start the anal. only with 1.0 mL of whole blood and that for PBDE with 1.5 mL of whole blood, resp.; these methods showed ultra high sensitivity. However, the S-V method cannot det. all isomer of PCBs and PBDEs but only predominant isomers of those chems. In the healthy volunteers examn., the SV-PCB detd. 13 isomers and the SV-PBDE method detd. four isomers, resp. The SV-PCB and SV-PBDE method detd. almost all levels in the sample; SV-PCB is 75% as compared with the sum of all PCB isomers level, SV-PBDE is 82% as compared with sum of all PBDE isomers level. .

Surface Exchange and Transport Processes Governing Atmospheric PCB Levels over Lake Superior

Surface Exchange and Transport Processes Governing Atmospheric PCB Levels over Lake Superior. Honrath, Richard E.; Sweet, Clyde I.; Plouff, Christopher J. (Department of Civil and Environmental Engineering, Michigan Technological University, Houghton, MI 49931, USA). Environmental Science and Technology, 31(3), 842-852 (English) 1997 American Chemical Society. CODEN: ESTHAG. ISSN: 0013-936X. DOCUMENT TYPE: Journal CA Section: 59 (Air Pollution and Industrial Hygiene) Measurements of gas phase PCB concns. at a site on the shore of Lake Superior are analyzed to det. the importance of regional air/surface exchange as a determinant of PCB concn. over the lake. During periods of onshore flow, results obtained in congener-specific regression analyses of log concn. against reciprocal temp. 92-52-4 and 60145-23-5 are cas registry numbers. These chemicals are also mentioned in this article. are strongly dependent upon time of year. During months when the lake is colder than the overlying air (resulting in a stable atm. over the lake), regressions for onshore flow explain 48-63% of the obsd. variance in log C, and the regression slope and intercept are consistent with Henry's law equil. between the lower atm. over the lake and aq. concns. Results consistent with Henry's law are obtained only when water temp. is assumed to be similar to air temp. measured at the site during flow off the lake; poor regression results (r2 = 0.00-0.06) are obtained when lake water temp. measured by data buoys is used. Based on consideration of the spatial variability of lake skin temp. during onshore flow periods, it is inferred that, under stable conditions, air/water equil. is reached rapidly and that atm. concns. at the measurement site are primarily affected by air/water exchange within 10-30 km offshore. These results are consistent with consideration of potential limitations of regression analyses of log C vs. reciprocal temp. Furthermore, they indicate that the net exchange of PCBs during the stable season over large lakes (Apr.-August or Sept. for Lake Superior) may be significantly less than previously estd. Regression analyses based on samples obtained during onshore flow in the unstable season and during over-land flow exhibit increased scatter and are inconsistent with the hypothesis of upwind equil. controlled by either Henry's law- or vapor pressure-mediated exchange at local temps. This result is consistent with rate limitations to atm./surface exchange over the lake and land surface and with the effect of atm. mixing processes. Implications of these results to the interpretation of concn. measurements at lakeside sites and the use of such measurements in calcns. of the air/water exchange flux of PCBs over large lakes are discussed. .