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| Laboratory Tips Safety proceedures, test reagents, drilling rubber stoppers, bending glass tubes, etc. Contributed to by chemists. |
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#1
 2003-11-22, 16:59
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DarkSky 
Regular
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Titrating
SWID seems to have a problem! After having a few successfull rxn but yet coming up with nothing after he finished eveporating from the A/B process SWID was getting flustrated. Today he trid again, after basing and collecting non-polar he took 75ml Dh20, added 10 drops of acid and shook like he was making a milk shake. He extracted the polar mix and, for the first time decided to check the ph...imagine his surprise when he got a reading of less than 5!
SWID then decided to check the ph of his Dh2o and to his surprise that came back with a reading of 5, after adding straight Dh20 to the Non-polar the reading came back 6! He checked his tap water and got a reading of 7.5.
Now SWID's question, is a reading of 5 for Dh20 normal?? He understands that meth comes over around 7.5 and does not think it migrates at 5. Would SWID be better off to use his tap water for this phase instead of Dh20.
Oh yes, SWID lives in the sticks and has well water which is heavy calcinated and has to be process by a water softener so all his tap water has been doubled filteres and treated via osmosis.
Can anyone help SWID, he knows hes got the rxn part down and just cant seem to get through the last step....HELP!!
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#2
 2003-11-22, 18:04
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Str8_Shooter! 
Regular
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Re: Titrating
Assuming your rxn was "successful" and has been dilluted to about five times the rxn fluid's original volume with -"Dh2o"- You are obviously not sufficiently basifying the meth/Dh2o solution. Use "Red Devil Lye" its available at most Grocery stores. Basify, as I'm sure you already know- to between +12 & +14, If your testing the ph somehow. I don't use test strips anymore, they are not "critical". I use a 50% (20% adds too much water for me thanks) lye/water solution, and, as you know, add a little lye , and stir. Keep adding more a little at a time until: The bottom layer doesn't clear up for a couple of minutes, it'll stay "milky", you'll probably see tiny solids floating around and after a good stir you will see a foam-looking head of bubbles breaking up and shooting into the NP. I'm sure you've read about "the fish smell" I haven't found it to be consistant or reliable for determining sufficient base. If you're still not sure, or you still don't get any dope, Basify until you "lye-lock, this is when your solution turns solid. It is usually easily unlocked by stirring in boilng Dh2o. Then you know the ph is high enough.
Give it one more good stir and allow the two layers to settle. Collect NP, and repeat, and repeat again if you like. I add each Collection of NP to a 1 liter plastic bottle add 1/4 the volume of Dh2o, and add 10-20 drops. For an ounce (of E) I usually start off with a cap full of muriatic, you're are basing it hard so it'll be hard to drive down. Put on the beloved squirt/twist top lid, shake the fuck out of it, drain it.
There is also a factor that probably isn't your problem. You should evap on "low" heat, don't fuck around like some of these ultra-conservatives claim to do...setting it on a lamp-shade well above the light-bulb, or setting it on top of a "warm" heater, fuck that stupid shit. Get it as hot as you want as long as its not boiling or bubbling at all actually, it should take no longer than an hour or so.
Like I said, that's probably not the problem, but with the info you provided I could'nt rule out the possibillity.
Good luck!
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#3
 2003-11-22, 22:08
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kirby 
Regular
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Re: Titrating
dont ever use tap water
even for drinking
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#4
 2003-11-23, 12:16
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stillbill 
Regular
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Re: Titrating
Hey Darksky, listen to Shooter! He's an excellent source of info and a master of his
finished product! Ask about his Texas lava-lamp product, from what I gather, it's some of that 2 hitter, gotta quit her stuff!
Ahahahahaa  Good luck
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#5
 2003-11-23, 23:16
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DarkSky 
Regular
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Re: Titrating
Well, I see one error SWID made right away, SWID was not adding 5x's d2ho to rxn fluid before basing. SWID will correct right away and plans to try a 10g rxn this weekend.
10gE/12gI2/10gRP, 7ml Dh2o and cook for 2 hours or more @190F....Anyone see any problems with this equasion?
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#6
 2003-11-24, 00:11
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Wicked_Rain 
Regular
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Re: Titrating
go for a minimum of 4 hrs. 8 would be better. 12 will please you and 24 will assure full reduction. if you insist on anything less than 4 cut DH2O back to 0.5 ml per G of E for a total of 5 ml. at least thats what this piece of paper i found stuck to my shoe said. good luck keep us posted.
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#7
 2003-11-24, 00:43
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DarkSky 
Regular
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Re: Titrating
Wish SWID could do a longer rxn but he has a limited window of time to work with and 2-3 hours is about all the time he has. He might be able to tweak out 4 hours and finish the A/B the next day...would he still use the .5ml per gE at 4 hours?
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#8
 2003-11-24, 12:20
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stillbill 
Regular
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Re: Titrating
Darksy, Wicked Rain is de man also! Either one of these guys(WR, Shooter) are 2 of the best for information esp. for newbs and for
journeyman. WR helped me learn how to make the infamous Two Hitter, Gotta Quitter. Like fallin off a log!  Shit that was 5x better
than bill had ever got off the streets!
Whatever WR picked up off his shoe is the word.
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#9
 2003-11-24, 15:44
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Frey Grimrod 
Regular
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Re: Titrating
Id say that might very well have been atleast one of swims problems if he was using 1ml of water per gram at 190f for only 4 hours....
thats what 87.777... degree's celsius. Now far be it from me to claim thats impossible and very far from a master... but it seems to me that...
thats low heat and high water content not very advantageous to completeing a rxn QUICKLY but great if you have time for a longer reflux.... swim was muttering about thinking he remembered the long wet reflux calling for somthing along the lines of 100c?
What were the contents in the flask looking like during the rxn? (As far as bubbles go)
And if swim has to take 2-4 hour "powernap" dreams perhaps he should do a little reading on the now dubbed " short fast " and listen to some of those here and elsewhere who have obviously perfected the trade.
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#10
 2003-11-25, 00:27
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DarkSky 
Regular
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Re: Titrating
OK, SWID wants to thank everyone for their input. Lets see if SWID has this dream right now,
.
10gE/12gI2/10gRP, 5ml Dh20 cooked for 4 hours (or longer if avaliable time permits)at 100C....Does that sound right?
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#11
 2003-11-25, 04:45
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Wicked_Rain 
Regular
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Re: Titrating
sounds ok. 100C is 212F maybe 105C for the last 30 min. if only allowed 4 hrs.
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#12
 2003-11-25, 05:16
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pikk 
Regular
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Re: Titrating
wr that sounds to hot for that short of time . thay are going to lose in the long run.
ds if more time is need go somewhere else . you are going to fuck your self by trying to go to fast
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