I suppose micron filtering in a solution of bacteriostatic water would filter the coloring/binders out of the Adderall IR, but I'm not so sure as I have never IV'ed.
I have plugged Dexedrine, though, and the comments on it being very close to IV administration are very spot on. It was so powerful and came on so quickly that it kind of scared me, and I've shied away from this super-fast ROA after a few times. However, I'm wondering if you're asking this question, because if you're interested in IV'ing Adderall, then for the love of God, don't; even with micron filters it's super unsafe due to levoamphetamine's quadrupled bioavailability... if you MUST IV, then just break that needle off and plug. Amphetamines are addictive enough without the damn needle.