I wrote this several months ago and never got around to finishing it. I found it in my Google drive and thought you guys might appreciate what I have. I may update this later. Sorry all the images are badly cropped, blurry, and have the bb watermark twice. I had to screenshot them off my Google doc (wouldn't let me just download them) and they were copy pasted in from the draft I made on bb (hence the watermark) so they've been regurgitated a few times.
hi!! for once i'm writing this myself rather than pulling it from the vespiary, so please be nice :x also i'm sorry if the title is vague.. fyi this isn't necessarily about the extraction process; it's a comparison of different pseudoephedrine containing pills and their properties (e.g. tamper resistance). if you're looking for an extraction tutorial, check out this one for plants and this one for pills. without further ado, let's go into the writeup!! ٩(^ᗜ^ )و ´-
table 1 gives us 3 brands of pseudoephedrine. zephrex-d -- which is advertised as meth deterrent due to its patented "tarex" technology -- appears to have the highest pseudoephedrine recovery. however, this success rate is conditional. on average, the zephrex-d tablets were the "most resistant to being solubilized." on the other hand, the sunmark tablets -- which don't have any tamper resistant compounds -- were the least picky of the bunch: "There were few conditions which supported similarly high (>70%) pseudoephedrine recoveries from all 3 study products. After as little as 30 min, Sunmark tablets were easily and readily dissolved (≥60%), regardless of other experimental conditions (eg, temperature, stirring), exhibiting weak solubility-resistant properties." additionally, the nexafed tablets showed more similarities to the sunmark tablets than to the zephrex-d ones.
the solvents in the table aren't named, but we are given this hint: "Two laboratory grade solvents (Solvents A and B) were identified as optimal solvents for use in these experiments based on pseudoephedrine recovery (Table 1). Solvent A was selected as the extraction solvent since recovery was slightly higher for Zephrex-D and Nexafed and this solvent was more easily evaporated." if someone wants to do some sleuthing, that would be super helpful. teamwork makes the dream work!! ☆(*^o^) 乂(^-^*)☆
next, the recovered pseudo was used to make meth, according to the "one-pot method." i'm guessing the researchers did a shake and bake since they said the operation was typically carried out in a 2 liter soda bottle. different precursor ratios were tested until meth was produced. they then refined the process to maximize the meth yield. according to the study, "Yield of methamphetamine using the initial conditions was approximately 23% (Sunmark). Reaction conditions yielding approximately 50%–65% methamphetamine yield were chosen for use in subsequent studies (...)
Using ground pseudoephedrine tablets and an identical procedure for all replicates, methamphetamine production was variable within and between pseudoephedrine formulations. The lowest methamphetamine yield occurred with Zephrex-D tablets (mean = 15%). The percent conversion to methamphetamine was greatest for Sunmark (mean = 62%), the non-tamper resistant product; Nexafed yield of methamphetamine was variable (mean = 39%)"
table 2, pictured above, used what was referred to as the "direct one-pot method" which is described in the title. while zephrex-d had the highest pseudo recovery, it ironically had the lowest meth conversion rate. i had high hopes when i saw the first table and was admittedly a little let down when i read this. sorry guys. these disappointing rates were lowered even more with the "indirect one-pot method" as shown in table 3:
here's the third table. i really wonder if there's a way we can use zephrex-d's high pseudo recovery to make some good d-meth without running into the same issues the researchers faced. if i can get the materials, i will gladly test this myself; if not for tweakers everywhere, then just to satiate my own curiosity. one small step for methheads, one giant leap for mankind!! *o( ^▾^˶ )o*
a 180 minute time-study was conducted to find an ideal reaction time. the meth output varied across all the experiments. however, "for both Zephrex-D and Nexafed, the conversion percentage of pseudoephedrine to methamphetamine increased through approximately 150 min (66.0% and 71.6%, respectively). A slight decrease in methamphetamine production was noted after 150 min for Zephrex-D and Nexafed, potentially due to the production of CMP [cyclohexadienyl)-2-methylaminopropane]." therefore, 150 minutes was chosen as the best reaction time! these graphs summarize the time studies:
zephrex-d:
nexafed:
sunmark:
ദ്ദി（• ˕ •マ.ᐟ references:
hi!! for once i'm writing this myself rather than pulling it from the vespiary, so please be nice :x also i'm sorry if the title is vague.. fyi this isn't necessarily about the extraction process; it's a comparison of different pseudoephedrine containing pills and their properties (e.g. tamper resistance). if you're looking for an extraction tutorial, check out this one for plants and this one for pills. without further ado, let's go into the writeup!! ٩(^ᗜ^ )و ´-
the solvents in the table aren't named, but we are given this hint: "Two laboratory grade solvents (Solvents A and B) were identified as optimal solvents for use in these experiments based on pseudoephedrine recovery (Table 1). Solvent A was selected as the extraction solvent since recovery was slightly higher for Zephrex-D and Nexafed and this solvent was more easily evaporated." if someone wants to do some sleuthing, that would be super helpful. teamwork makes the dream work!! ☆(*^o^) 乂(^-^*)☆
next, the recovered pseudo was used to make meth, according to the "one-pot method." i'm guessing the researchers did a shake and bake since they said the operation was typically carried out in a 2 liter soda bottle. different precursor ratios were tested until meth was produced. they then refined the process to maximize the meth yield. according to the study, "Yield of methamphetamine using the initial conditions was approximately 23% (Sunmark). Reaction conditions yielding approximately 50%–65% methamphetamine yield were chosen for use in subsequent studies (...)
Using ground pseudoephedrine tablets and an identical procedure for all replicates, methamphetamine production was variable within and between pseudoephedrine formulations. The lowest methamphetamine yield occurred with Zephrex-D tablets (mean = 15%). The percent conversion to methamphetamine was greatest for Sunmark (mean = 62%), the non-tamper resistant product; Nexafed yield of methamphetamine was variable (mean = 39%)"
a 180 minute time-study was conducted to find an ideal reaction time. the meth output varied across all the experiments. however, "for both Zephrex-D and Nexafed, the conversion percentage of pseudoephedrine to methamphetamine increased through approximately 150 min (66.0% and 71.6%, respectively). A slight decrease in methamphetamine production was noted after 150 min for Zephrex-D and Nexafed, potentially due to the production of CMP [cyclohexadienyl)-2-methylaminopropane]." therefore, 150 minutes was chosen as the best reaction time! these graphs summarize the time studies:
zephrex-d:
ദ്ദി（• ˕ •マ.ᐟ references:
