Heroin, morphine, dipropionylmorphine, dibenzoylmorphine, all those have a SHITE bioavailability. I only know it off the top of my head for morphine and its about 30% bioavailability per os, IF you are lucky. So poor is the bioavailability that there is little point in even taking these drugs orally IMO. Granted I've got a beastly obnoxious shitbag of a tolerance (used to be about a gram and a half IV morphine sulfate, tops, now I can do close to the same if not the same with dipropionylmorphine (its about 3.5x-4x the potency of H)
Buggers never did give me enough pain meds to begin with (higher dose morphine, lower dose oxycodone), so its all got to get esterified. But plugging DOES work, not the most pleasant thing but it works. No rush but far better bioavailability. Don't waste these by mouth, its fucking worthless and a massive waste. DON'T go near the apomorphine, it is a powerful, powerful emetic. Although used as a DA agonist in very small doses for parkinsons. For a DA agonist (very pleasant if one gets the right one, with opioids IV) I'd go with pramipexole first or if not, piribedil.
Reagent test kits are available via pill test kits. Look specifically for marquis and Froehde's, you might have to search for the latter separately I don't know, because I don't buy kits I make my own reagents up as and when needed. I can picture the Froehde's reagent not being part of standard kits only through logical deduction since its unlikely H would turn up in Es, which are what most of the kits are aimed towards screening. If needs be, 95-98% sulfuric acid is cheap, although a nuisance to ship large quantities since its so heavy. Do NOT let it get on you. First, wearing some cheap goggles is a must, will save your eyes if you get hit. Add acid to cold water, slowly, because the dissolution of sulfuric acid in concentrated form is highly exothermic, doing it the other way it will hiss and spit and spatter, and you don't want that shit on you. Pour a bit onto some sugar in a disposable vessel like a tin can and watch what happens. The molybdic acid or sodium/potassium molybdate, just don't eat it, it won't jump out and rip your face off or anything, its a solid, you may be better off making up the sulfuric cold, then heating it, stir with a glass rod. A little bit of molybdic acid/sodium molybdate, will go a long way.
Seriously though, wear gloves and goggles handling the acid. I once spilled some 98% sulfuric on the floor, and rushing to dispose of something nasty overheating with same as a primary ingredient, spilled it. Charred a hole in the floor like a fucking blowtorch would. And on sugar, its such a powerful dehydrating agent when concentrated to that level that it removes the -OH groups from the sugar, and burns it to inorganic carbon, a wee bit of sugar starts to slowly swell, and smoke and stink a fair bit, and it expands before your very eyes until theres a sizeable bit of (still acid-soaked, so watch it) foamy solid carbon left behind.
Since your only using one or two drops of prepared reagent per test, a single liter of conc. sulfuric will last you a long, long time, as will a fairly small amount of molybdic acid or sodium molybdate.
Look up the reagents on wikipedia for more info, also chances are, if there IS any vinegary smell the pills are either real, or if fake, aspirin. I'd personally fuck the testing right off for these, since it isn't as if they are going to turn up PMA or the like, not party pills if you see what I mean and just plug an amount according to your opioid tolerance. If they were faked with aspirin its not going to kill you, it'd just be taking a couple of aspirin, only, up the arsehole instead of swallowing the things haha.
As for the extraction, powder pills up, suspend in hot methanol (cheapest) you won't need much, the morphine type alkaloids are usually very soluble in methanol, let it stand for a while, decant with measuring syringe, separate that portion out, and then do a few more such washes, doing the same, and finally, in a separate container so you can tell how well they perform, a coffee filter, since you sound like you won't have the likes of fritted filter funnels available, if its free of crap and active when plugged (no alcohol for that, you A-don't want to plug alcohols it will burn your arse if concentrated, plus methanol is not to be ingested, it is toxic, and can either blind or kill. Let it evaporate off. The plugging testing bit you just dissolve a few pills in ordinary water, ground up and plug the lot.
With the alcohol bit if you do so, combine the decanted portion and evaporate as well as in a separate container evapping the stuff passed through the coffee filter to obtain the goods, the stuff left behind will be mostly binders, although you could let it dry off and then suspend in H2O and plug it too when you do some more of the gear. Lucky fucking fucker
