Chlorobiphenyl determination

DE Boer J, van der Meer J, Brinkman UATh (1996) Determination of chlorobiphenyls in seal blubber, marine sediment, and fish interlaboratory study. ( Assoc Off Anal Chem 79 83-96. 

Tuinstea LGMTh, Roos AH, Werdmuller WA (1985) Capillary gas chromatographic determination of some chlorobiphenyls in eel fat interlaboratory study. J Assoc OffAnal Chem 68 756-759. 

International Council for the Exploration of the Sea (ICES). 1992. Report on the Results of the ICES/IOC/OSPARCOM Intercomparison Exercise on the Analysis of Chlorobiphenyl Congeners in Marine Media — Step 1 and the Intercomparison Study of the Determination of Cbs in Baltic Herring Oil. ICES Coop. Res. Rep. No. 183. 

Figure 1. Restriction fragment finger print for the 4-chlorobiphenyl catabolic plasmid pSS50 determined by agarose gel electrophoresis. (Lanes A, kHind III standard B, undigested C-H enzymatic digests of pSS50, C, Eco RI D, Bam HI E, Hind HI F, Eco M and Bam HI G, Esq RI and Hind IH H, Hind m and am HI )...

PCBs available for various uses. For this reason, 2-chlorobiphenyl and a mixture of Aroclor were studied. Samples (100 mL) of the mixtures were prepared with 265 (ig/mL of PCB and 25 pg/mL of Ti02. The pH of the samples was adjusted to 3, 7, and 10. The samples were irradiated under a UVA-340 light source for 120 min. The concentrations of the PCBs were determined using GC. The degradation rate of 2-chlorobiphenyl increased with decreasing pH values. After 1 hour of irradiation, more that 90% of the PCBs had been degraded at pH 3 and pH 7. The degradation rate constant, k, can be determined from the first-order reaction model ... 

J. de Boer, Q. T. Dao, P. G. Wester, S. Bowadt and U. A. Th Brinkman, Determination of mono-ortho substituted chlorobiphenyls by multidimensional gas chromatography and their contribution to TCDD equivalents , Anal. Chim. Acta 300 155-165 (1995). 

Air atmospheric photodegradation, 0.62-1.4 d (Dilling et al. 1983) calculated tropospheric lifetime of 5-11 d due to calculated rate constant of gas-phase reaction with OH radicals for mono-chlorobiphenyls (Atkinson 1987) the tropospheric lifetime of 2.7-5.1 d based on the experimentally determined rate constant for gas-phase reaction with OH radicals for monochlorobiphenyls (Kwok et al. 1995). 

Stolzenburg, T.R., Andren, A.W. (1983) Determination of the aqueous solubility of4-chlorobiphenyl. Anal. Chim.Acta, 151,271-274. Stucki, G., Alexander, M. (1987) Role of dissolution rate and solubility in biodegradation of aromatic compounds. Appl. Environ. Microbiol. 53, 292-297. 

Tuinstra LGMT, Van Rhijn JA, Roos AH, et al. 1990. Determination of planar chlorobiphenyls in animal fat. Journal of High Resolution Chromatography 13 797-802. 

D. E. Wells, I. Echarri, Determination of individual chlorobiphenyls (CBs), including non-ortho, and mono-ortho chloro substituted CBs in marine mammals from Scottish waters, in J. Albaiges (Ed.) Environmental Analitical Chemistry of PCBS. Current Topics in Environmental and Toxicological Chemistry. Gordon and Breach Science Pub.. Amsterdam. 1993, 197-219. 

Creaser CS, Krokos F, Startin JR. 1992. Analytical methods for the determination of non-ortho substituted chlorobiphenyls A review. Chemosphere 25(12) 1981-2008. 

Wells DE, Echarri I. 1994. Determination of chlorobiphenyls, with the separation of non-ortho, mono-ortho and -ortho chloro congeners in fish and sea mammals. Anal Chim Acta 286(3) 431-449. 

Van Rhijn, J. A., Traag, W. A., van de Spreng, P. F., and Tuinstra, L. G. M. Th., Simultaneous determination of planar chlorobiphenyls and polychlorinated dibenzo-p-dioxins and -furans in Dutch milk using isotope dilution and gas chromatography-high-resolution mass spectrometry, J. Chromatogr., 630, 297-306, 1993. 

Figure 1 Methods used for the isolation, cleanup, and fractionation of PCBs in (A) wet sediment and (B) dry sediment. (Reprinted with permission from Smedes F and de Boer J (1997) Determination of chlorobiphenyls in sediments - analytical methods. Trends in Analytical Chemistry 16 503-517 Elsevier.)...

The distribution of trace organic compounds such as chlorobiphenyls (CBs) and polycyclic aromatic hydrocarbons (PAHs) in seawater and marine particulate matter is determined by the complex influence of physical, biological and chemical processes. The interpretation of horizontal and vertical distribution patterns of these substances requires information on the corresponding characteristics of the water bodies, e.g., temperature, salinity, depth and the concentrations of nutrients and dissolved oxygen. 

The chlorobiphenyls are chemically related compounds with a wide range of physicochemical properties such as vapour pressure, water and lipid solubility, and particle/solution distribution coefficients. They can thus be used as model compounds to forecast the behaviour and distribution of other, less well studied organics. The CB distribution patterns can be used as a basis for theoretical models to evaluate the reliability of experimentally determined distribution patterns of a variety of compounds. 

Franc has used gas chromatography for the determination in organosilicon monomers of down to 0.001% of benzene, chlorobenzene, chlorodiphenylsilane, chlorophenylsilane, biphenyl, chlorobiphenyl, dichlorophenylsilane and o- and p- terphenyls. The column comprised 135 cm X 5 mm of Rysorb BLK supporting 10% of polymethylphenyl-siloxane and was operated at 210°C with a 3.1 litre per hour nitrogen carrier gas flow rate. 

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