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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 
Old 2004-01-08, 07:32
oops_i_od'd oops_i_od'd is offline
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Default Swiod's Pain In the Ass

. . .or recrystalizing. Swiod wants crystals- not some tree-huggin-hippie-crystal but rather some diamondesque type crystals. He uses ispropyl for cryst. and then gives it a tone flash, but always the same- never grows! Anyways, he'd like to know if puttin it in the freezer would make a difference like someone suggested once, and/or any other tips. he says thanx
 #2 
Old 2004-01-08, 08:35
RNX57 RNX57 is offline
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Default Re: Swiod's Pain In the Ass

from what swim reads, room temp dryin will give larger crystals, swim was thinkin of dreamin hot ipa n cold tone and then freezer. but was thinkin of tryin a slow dryin ina closet.

never done a recrystalizen yet so swim only knows what he read, but soon will dream of tryin it out to see it.

rnx57
 #3 
Old 2004-01-08, 08:44
kirby kirby is offline
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Default Re: Swiod's Pain In the Ass

dissolve your goodies in the iso

evap the iso till a scale appears

couple of ml of acetone added

allow an hour to cool

an hour in the fridge

6 to 24 hours in the freezer

youll see crystals then
 #4 
Old 2004-01-08, 17:00
oops_i_od'd oops_i_od'd is offline
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Default Re: Swiod's Pain In the Ass

swiod thanks both of you- kirby, how much iso and how much tone? Just over the crystals? I know you said a couple of ml's, but I'm not work'n w/much- or does it even matter?
 #5 
Old 2004-01-08, 21:10
kman kman is offline
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Default Re: Swiod's Pain In the Ass

Swim's heard that it isn't worth doing this with less than a ball.

[This message has been edited by kman (edited 01-08-2004).]
 #6 
Old 2004-01-08, 23:14
stillbill stillbill is offline
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Default Re: Swiod's Pain In the Ass

You are absolutely correct, Kman!
 #7 
Old 2004-01-10, 17:38
Cyanide_Christ Cyanide_Christ is offline
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Default Re: Swiod's Pain In the Ass

kirby said how, but not why: the more gradual of a cool-down you give it (more time over a broad range of temperatures), the larger the crystals will grow. The same amount of time spent at a constant temp (ie chucking it in the freezer) will not generate nearly as many crystals; it's not gradual enough.
 
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