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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 2003-09-23, 00:38
funnelmasta funnelmasta is offline
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Default two problems

When swim was trying the i2 extraction in "here it is all three steps" he used 8 oz povidone iodine 10% 125 ml dh2o 10 ml sulfuric acid "aquarium ph down" and 8 oz 3%peroxide. After 4 hours what remained was a jar of jelly.

Now the question is what went wrong should he use some muriatic acid or is povidone the wrong stuff or both?
 #2 
Old 2003-09-23, 01:48
lukkydleprachan lukkydleprachan is offline
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Default Re: two problems

That method of extraction will not work with pov. iodine.

SWIU needs the little 1 oz. 2 % bottles or the 7% jugs available from a feedstore.

Lukky D
 #3 
Old 2003-09-23, 02:09
funnelmasta funnelmasta is offline
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Default Re: two problems

what precent of what kind of acid is best muriatic ?
 #4 
Old 2003-09-23, 02:43
kman kman is offline
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Default Re: two problems

I've never used HCl, i've always used H2SO4.
 #5 
Old 2003-09-23, 13:24
mnm mnm is offline
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Default Re: two problems

quote:what precent of what kind of acid is best muriatic ?

ACS Grade is preffered over Muriatic or Drain Cleaner for HCl and H2SO4 respectively.

Though when in a pinch Muriatic will suffice.

Just be sure you muriatic is clear/colorless, and if using H2SO4 a little yellow is acceptable. But remember, ACS grade acids are clear colorless.
 #6 
Old 2003-09-24, 02:53
funnelmasta funnelmasta is offline
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Default Re: two problems

so what are the amounts roughly for 1 pint of 3%peroxide and 1 pint of 3%tinc if you were to use wallys muriatic
 #7 
Old 2003-09-24, 04:07
Burner_303 Burner_303 is offline
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Default Re: two problems

i found a mixture that works perfectly, its very small scale but u just scale it up and it works perfectly......

50ml 2.5% tinc. 12.5ml 31%HCL(aq), 25ml H2O2

then add 100mls DH2O. (a little less water recomended and perhaps a little more H2O2)

scale up as needed, this has high yeilds..... excellent result...
 #8 
Old 2003-09-24, 05:13
mnm mnm is offline
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Default Re: two problems

If the povidone containing Iodine solution is all you have readily available. Resublimation via coldfinger is a route you might consider.
 
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