TABLE 1.

Homolog distribution and chlorine distribution of Aroclor 1260 after 181 days of incubation

Homolog or chlorine	Distributiona
	Aroclor 1260 at 0 day	After 181 days
		Aroclor 1260	Aroclor 1260 + 2,3,4,5-CB	Aroclor 1260 + 2,3,5,6-CB
PCB homologsb
Dichlorobiphenyls	0.10 ± 0.00	0.19 ± 0.03	4.15 ± 0.56	0.98 ± 0.52
Trichlorobiphenyls	0.71 ± 0.01	3.81 ± 0.55	14.87 ± 0.42	5.71 ± 0.80
Tetrachlorobiphenyls	1.42 ± 0.03	53.36 ± 4.53	60.01 ± 1.35	61.67 ± 1.30
Pentachlorobiphenyls	10.81 ± 0.16	11.35 ± 0.55	10.43 ± 0.52	9.84 ± 0.14
Hexachlorobiphenyls	45.65 ± 0.13	12.64 ± 2.66	4.60 ± 1.42	13.54 ± 1.91
Heptachlorobiphenyls	35.61 ± 0.18	14.33 ± 2.55	4.17 ± 1.17	5.90 ± 1.22
Octachlorobiphenyls	5.21 ± 0.09	3.84 ± 0.38	1.36 ± 0.26	1.91 ± 0.31
Nonachlorobiphenyls	0.49 ± 0.01	0.48 ± 0.01	0.41 ± 0.03	0.45 ± 0.01
Chlorines
ortho	2.49 ± 0.00	2.26 ± 0.02	2.04 ± 0.01	2.19 ± 0.03
meta	2.55 ± 0.00	1.39 ± 0.12	0.89 ± 0.07	1.15 ± 0.05
para	1.27 ± 0.00	1.28 ± 0.01	1.23 ± 0.01	1.23 ± 0.01
Total	6.31 ± 0.01	4.93 ± 0.15	4.16 ± 0.08	4.57 ± 0.07

^aAll data are means of triplicate determinations ± standard deviations. Data for PCB homologs are in moles percent, and data for chlorines are per biphenyl. 

^bNo mono- or decachlorobiphenyls were detected.