ill try clear it up a little bit, and explain it really simple, maybe we mean the same thing, but are both wording it badly?
Lets just pretend that an Oxycontin (the pill) weighs 800mg. (obviously it doesn't I'm just trying to show you what I mean)
so that means that 1/10 one tenth, of the pill would be 80mg's. << now that wouldn't be pure, as if has fillers/binders etc.
But if you did happen to extract it, and get rid of all the fillers/binders then you would be left with 80mg's of 'pure' Oxycontin (the drug, not the pills)
I'm really bad at explaining things, but I'm trying to understand where your coming from. So here's an example I thought of.
EG: You have 1 Oxycontin (pill) that is 80mg's (not by weight, but 80mg's of the actual drug in it)
You do an extraction. From the pill weight (much more than 80mg) You have now come up with 80mg of the drug that was in the pill. This would be 'pure' Oxycontin, with no binders or fillers.
If I'm not getting any closer just tell me, I'll stop posting if you want, I'm just curious if that's what your trying to say.