I was thinking about the people that say, my dope is 60% pure or whatever. I aksed how anybody knows inanother thread and got no answers, so I am assuming it is just a bullshit guess not based on anything. But then I was thinking. Could you get an approximate purity by comparing the high with another drug, probably morphine. I know the dosages here and weights are gonna be wrong, but I am going to use round numbers for simplicty sake. This would also be a bit subjective, but close, maybe. Here goes.

Say you could IV morphine and heroin at 2 seperate times, both times completely sober. IV an amount of each so as to get the same high from both(of course this is subjective, but say youcould get close). Could you then extrapolate that info to figure the purity of the heroin?

Say it 200 mgs(.2gm) to get high on IV H

It also takes 20 mgs of morphine to get same high

Therefore, it takes 10% of the amount of H to get high on M, and figuring H is

2X as potent as M, H is 5% pure.

In my mind, that makes sense, but there is a reason that I majored in History and not math or chem. I could be 100% wrong here, somebody let me know if I am. Obviously, like I said, this is not exact and it is impossible to quantify a high, but just figure that you can. Is this process anywhere near correct?