Table 1.

Mass balance and distributions of exposure chemicals (4′-MeO-PCB 3 and 4′-PCB 3 sulfate) (% of mass applied) in exposure groups and unplanted controls after 10 days hydroponic exposure.^a

Reactors	Samples	4′-MeO-PCB 3 (%)	Total 4′-MeO-PCB 3 recovered (%)c	4′-PCB 3 sulfate (%)	Total 4′-PCB 3 sulfate recovered (%)
Exposure groups	Shoots	0.07 ± 0.06b	51.6 ± 5.6	_d	0.24 ± 0.08
	Top woods	0.02 ± 0.03		0.02 ± 0.01
	Top barks	0.05 ± 0.05		_
	Bottom woods	0.57 ± 0.03		0.17 ± 0.06
	Bottom barks	8.34 ± 1.48		_
	Roots	10.2 ± 2.0		0.04 ± 0.02
	Solutions	32.3 ± 4.5		n.d.e
Unplanted controls	Solutions	72.1 ± 27.6	72.1 ± 27.6	47.9 ± 6.2	47.9 ± 6.2

^aThe recovered 4′-MeO-PCB 3 and 4′-PCB 3 sulfate in different components expressed as the mass percentage of initial exposed chemical. The initial mass of 4′-MeO-PCB 3 and 4′-PCB 3 sulfate was 400 μg and 397 μg, respectively.

^bMean value ± standard deviation, n = 3.

^cThe summation of different components.

^dThese samples were not analyzed in this work.

^eNon-detectable.