caa a22 4500 465746128 CHVBK 20180323111821.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00332252 doi (NATIONALLICENCE)springer-10.1007/BF00332252 Studies of the global baseline pollution XIII [Elektronische Daten] C6-C14 organohalogens (α- and g-HCH, HCB, PCB, 4,4′-DDT, 4,4′-DDE, cis- and trans-chlordane, trans-nonachlor, anisols) in the lower troposphere of the southern Indian Ocean [R. Wittlinger, K. Ballschmiter] Summary: High-volume air sampling by adsorption on silica gel on the island Réunion (21°S, 56°E) in the southern Indian Ocean was done for analyzing typical southern hemisphere air for semivolatile organohalogens such as α-hexachlorocyclohexane (13) and g-hexachlorocyclohexane (406), hexachlorobenzene (7), polychlorobiphenyls [PCB 28 (3.2); PCB 52 (4.9) PCB 101 (6.0); PCB 138 (5.0); PCB 153 (5.0); PCB 180 (1.5)], 4,4′-DDT (8), 4,4′-DDE (19), cis- (4) and trans-chlordane (9), trans-nonachlor (3) and heptachloroepoxide (6) in the lower troposphere. The values in parenthesis are mean concentrations in picogram per m3 air. Local input and long range transport could be distinguished in most cases. The 2,4-, 2,6-, 2,4,5-, 2,4,6-, the tetra- and pentachloro-congeners of the chloroanisoles (phenylmethyl-ethers) were detected. 2,3,5,6-Tetrachloro-1,4-dimethoxy-benzene was found in the 100-280 pg/m3 range, while 2,4,6-tribromoanisol was detected in the 8-30 pg/m3 range together with traces of 2,4- and 2,6-dibromoanisole. The sources and the fate of the latter compounds are not yet understood, since both anthropogenic emissions and biogenic origin are possible. The ratios of the concentrations in the southern and northern hemisphere (south/north ratio) of the semivolatile organochlorine compounds are discussed. The south/north ratio ranges from 0.05 to 0.09 for HCB and α-HCH, respectively, to 0.74 for the PCBs and 0.9 for g-HCH, to 3 for 4,4′-DDE and up to 8 for 4,4′-DDT. This indicates that there is no significant interhemispheric exchange for compounds such as HCB and α-HCH in the atmosphere, and as a consequence the same must be true for other semivolatile compounds. Springer-Verlag, 1990 Wittlinger R. Department of Analytical Chemistry and Environmental Chemistry, University of Ulm, D-7900, Ulm, Federal Republic of Germany aut Ballschmiter K. Department of Analytical Chemistry and Environmental Chemistry, University of Ulm, D-7900, Ulm, Federal Republic of Germany aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/3(1990-01-01), 193-200 0937-0633 336:3<193 1990 336 216 https://doi.org/10.1007/BF00332252 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00332252 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wittlinger R. Department of Analytical Chemistry and Environmental Chemistry, University of Ulm, D-7900, Ulm, Federal Republic of Germany aut NATIONALLICENCE 700 1- Ballschmiter K. Department of Analytical Chemistry and Environmental Chemistry, University of Ulm, D-7900, Ulm, Federal Republic of Germany aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/3(1990-01-01), 193-200 0937-0633 336:3<193 1990 336 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer