@article {636,
	title = {Stable chlorine isotopic compositions of aroclors and aroclor-contaminated sediments},
	journal = {Environmental Science \& Technology},
	volume = {34},
	year = {2000},
	note = {330rcTimes Cited:39Cited References Count:16},
	month = {Jul 1},
	pages = {2866-2870},
	abstract = {An exploratory investigation was conducted to evaluate if stable chlorine isotopic ratios of polychlorinated biphenyls (PCBs) could be useful in studying the processes that determine their transport and fate in the environment First, we determined the variability of delta(37)Cl in the source materials for PCBs. Second, we determined if the delta(37)Cl values of contaminated environmental samples fell outside the range in source variability. The isotopic variability among the source materials (Aroclors) was rather small; delta(37)- Cl values ranged from -3.37 to -2.11\% (mean and standard deviation, -2.78 +/- 0.39\%, n = 12). There was no correlation between the delta(37)Cl values and percentages of chlorine in the mixtures. We also found very similar values in several Clophen mixtures and one Phenoclor. The delta(37)Cl values in the total PCBs isolated from Aroclor-contaminated sediments from the Hudson River, New Bedford Harbor, and Turtle River Estuary ranged from -4.54 to -2.25\% (n = 19). While most of the delta(37)Cl values were within 2 standard deviations of the mean Aroclor value (our assumed estimate for overall source variability), two of the PCB contaminated sediment samples from New Bedford Harbor did appear to be isotopically distinct. The PCBs in these sediments had lower amounts of less chlorinated congeners (when compared to the source material) and were likely isotopically affected by alteration processes that preferentially removed these congeners. Compound specific measurements of two congeners in Aroclor 1268 suggest that there are no large congener-specific differences in the stable chlorine isotope ratios in Aroclors. This study shows that the delta(37)Cl Values of PCBs may be a potentially useful diagnostic tool in studying the transport and fate of PCBs and indicates that additional research is warranted.},
	issn = {0013-936x},
	doi = {10.1021/es9908220},
	author = {Reddy, C. M. and Heraty, L. J. and Holt, B. D. and Sturchio, N. C. and Eglinton, T. I. and Drenzek, N. J. and Xu, L. and Lake, J. L. and Maruya, K. A.}
}
