Yes, as in a solar still. The volatization of the toxic compounds would only be a factor if the condensation point was identical to that of water, in which case a reflux chamber could be added, if you were really worried about it. I think you'll find that most of those compounds don't volatize very well (or the plants would have a tough time keeping their production rate up) at ambient temps, and will either recondense at a higher or lower temp, thus making it possible to isolate them in the condensate line from the water.
Like I said, it wouldn't be easy, but it can be done. We were isolating alchohol from water in high school. How hard can it be?
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)