On SwiM's first attempt he yielded 0.6g of I2. He used 50ml of 2.5% tinc.

Is this a shit yield? He was hoping for something nearer to 2g.

What is a ballpark yield for yhis amount?

Thanks.

swim has never done anything this little ( not dissing you man) but i can tell you from a pint of 7% swim gets about 43 to 45 grams

Ta SwiP, it was sort of a first off training exercise. Now to work out the relative math!

If you're going to experiment with very small quantities, don't consider yield at all. Pay attention to the procedure and observe the timing and changing characteristics constantly throughout.

If the end product was of acceptable or better QUALITY, then you should consider it a success. The QUANTITY is completely irrelevant and misleading at best

I'm sure you already know most of this and most likely have regional problems finding stuff, but just in case:

Swiss uses 7% tincture of iodine, he gets it at feed stores, he's from Dallas so there's plenty of feed stores, 1 pint is anywhere from 5 to 12 dollars. He takes a gallon jug and for every pint of tinc adds 3 pints of peroxide, 1/2 cup of dh2o and 2oz's of muriatic acid, add the tinc last,(do it in the dark) cap it, shake the fuck out of it, wait about 20 minutes, shake again, put on cr gloves and pour into the corner cut out of a 240 count wht. pillowcase, rinse with at least a gallon of dh2o, twist the fuck out of 'em to wring 'em out and dry 'em in whatever fasion best works for you from there.

(Swiss is of course not Swedish, and would like to trade e-mails with you sometime and see what its like in the UK!)

Swiss almost forgot...he yields about 40-50 g's too.

I would not hope for 2g, thats not going to

happen.

Your results aren't that bad, as only 1.25

grams or so of I2 will be in 50ml of 2.5%

tincture.

But, your yield could be better, as I've

obtained .9g from 60ml of 2% (1.2g or so

possible)

My suggestion, as above would be to use

a pint of 7% tincture, MUCH less expensive

and easier to work with, and depending on

method of obtaining it - less watched than

tincture.



[This message has been edited by cbb2k (edited 06-30-2003).]

Str8: Did you not see the thread where I did a cut and paste of Geez's Newest Tincture Recipe. It works even better, and grows some beautiful, clean I2 spikes(crystals).

40-50 grams from a gallon???

Lukky D

Thanks for the info guys.

cbb2k, that info sounds about right, but the iodine from tinc page at Rhodium mentions 100ml of 5% tinc being used with a yeild of 8.2g, which is why SwiM was hoping for about 2g, which admittedly seems like a lot.

Why the discrepancy, do you think?

Lukky didn't just waste his time posting Geez's most excellent discovery, did he?

BTW Lukky, is that an error in your 09:53 post. 40-50 grams from a GALLON????

Shooter, it looks like you are getting some pretty good yields from that Texas crude. Makes me wonder what kind of "crazy large" numbers you could get if you tried Geez's new method. Sure would be good of you to give it a shot and let us know your results.

7% right over there in the big city. And for less than $15 a pint! Damn, I need to quit fuckin' around, get those nuts to drop, and go get some!

Masahed--

It is entirely possible to obtain 1 gram per ounce of 2% tincture on a consistent basis. The different brands in the US are somewhat variable, but still between 45-50 grams per fifty bottles (50 oz/1.5l).

The reason 2% is a little harder to handle that 7% or higher, has to do with the relative quantity of alcohol compared to water when you react. The more residual alcohol when rinsing, the more of your hard earned iodine will dissolve and go bye bye. If you want to mull over the calculations, here you go:

Oxidisers used with tinctures:H2O2,NaOCl

Reactions shemes:

With H2O2: 2KI+2HCl+H2O2-->I2+2KCl+2H2O

With NaOCl:NaOCl+2HCl+2KI-->NaCl+2KCl+H2O+I2

Some of of H2O2 or NaOCl is used to form I2 from iodide:

2I+H2O2+2HCl-->I2+2H2O+Cl2

2I+NaOCl+2HCl-->I2+NaCl+H20+Cl2

NaCl and KCl go to water that is added before reaction.

Tinctures contain equal amounts of iodine salt and iodide



Theoretical yield of I2 from KI is ~76 % and theoretical yeild of I2 from I is 100%.

Iodine sublimes within few days when left on table.Also direct sunlight helps subliming.Must be kept in closed container and in dark.Good way to dry iodine is to lay it on newspaper or on toilet paper.Paper will suck liquid out iodine.When iodine is really wet then one must change paper few times.

Dealing with tinctures:

Ratio of H2O2/KI is 2 moles of H2O2 per 4 moles of KI teoretically.Also we need H2O2 to oxidise I to I2,that's 2 moles of H2O2 per 4 moles of iodine.Ratio of KI/H2O2 is 68 grams of H2O2 per 664 grams of I2.Since KI/I ratio in tincture is 50/50 we must use H2O2 to oxidise I too.That would be 2 moles of H2O2 per 4 moles of I.Thats 68 grams H2O2 per 508 grams of I.

We have 2% tincture.

1 gram of KI and 1 gram of I.H2O2 needed is then 0,133 + 0,1=0,233 grams of H2O2.Since we use 3% H2O2 then we would need 7,689 grams of 3% H2O2 per 100 grams of 2% percent tincture.

Now with 7% percent we must use 3,5 as much as with 2% so that's 26,9115 grams per 100 gram of tincture.

That's so only in theory.

Practically i use 2 times as much H2O2 as in theory to ensure

fast and full conversion.

Props to the original poster--Raffike

Shooter--

You said something about simple answers for simple questions. Yes, the questions are simple, but the simple answer will many times confuse the reader because he/she lacks the knowledge and understanding necessary to fill in the blanks left by the simple answer. Usually its the ones who don't want you to fuck up a hundred times who say to research thoroughly first, then try, then ask. This way you ask a more informed question and allow a more informed answer.