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DraconicAcid
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Quote: Originally posted by mayko  | If you check out Experiments in Organic Chemistry by Louis Fieser, 1941 (available from the forum library), there is a chapter on isolating urea from
urine, as well as a chapter on eating sodium benzoate to increase the hippuric acid content of urine before isolation.
The latter in particular sounds like an interesting experiment that would never be done in a modern university. |
It was still in the lab manual in 1991 at the University of Alberta.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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ElectroWin
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check for: sodium bicabonate, and urea nitrate
fresh urine has virtually no nitrates, but after it has fermented awhile in air, (especially in the dark), bacteria make nitrates. and urea nitrate is
sparingly soluble so i think you should find it in there. Naquet, 1855: principles of chemistry gives a method for preparing pure urea from urine. If
you want to try this I suggest evaporating at reduced pressure, to speed the process without creating biuret.
the bicarbonate will be in there if there has been enough time to absorb CO2 from the atmosphere.
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phlogiston
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| Quote: Originally posted by zed |
Might be small amounts of really valuable stuff even in average urine. Antigen-Antibody complexes, and whatnot. |
In the Netherlands, urine from pregnant women is collected on a very large scale (about 30000 liters a week) and used to isolate Human Chorionic
Gonadotropin (HCG), a hormone. It is used to prepare a drug to treat infertility problems. I have been told this is the only country where this is
done.
On a side note, for those interested in the history of discoveries, the last author in the ref posted by solo:
| Quote: Originally posted by solo | Reference Information
Isolation and identification of morphine 3- and 6-glucuronides, morphine 3,6-diglucuronide, morphine 3-ethereal sulfate, normorphine, and
normorphine 6-glucuronide as morphine metabolites in humans
S. Y. Yeh C. W. Gorodetzky H. A. Krebs
Journal of Pharmaceutical Sciences
Volume 66, Issue 9, pages 1288–1293, September 1977
DOI: 10.1002/jps.2600660921
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is the famous Hans Krebs, best known for his discovery of several very important metabolic pathways in the early 30's, including the citric acid cycle
(or 'Krebs cycle') and the urea cycle and winning the nobel prize in medicine in 1953.
[Edited on 10-9-2013 by phlogiston]
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"If a rocket goes up, who cares where it comes down, that's not my concern said Wernher von Braun" - Tom Lehrer |
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kt5000
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You bottle pee??  Urea, man, lots of urea. Good for fertilizing lawns and
damn near anything else, iirc.
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UnintentionalChaos
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It is really odd that this thread surfaces again...I was just considering doing the prep of hippuric acid...
Department of Redundancy Department - Now with paperwork!
'In organic synthesis, we call decomposition products "crap", however this is not a IUPAC approved nomenclature.' -Nicodem
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thebean
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I few months back I was told that adding NaCl to urine could produce ammonia over a few months. Being inquisitive I did so and discovered after about
five months that there was no NaCl, but a deep green insoluble. Could anyone tell me what this green insoluble might be?
"You need a little bit of insanity to do great things."
-Henry Rollins
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eidolonicaurum
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You can get urea from urine, and white phosphorus. Much else is usually so low in concentration as not to be worth it. Unless you're really
desperate.........
Urea can be extracted like this:
Boil down urine so smaller volume to deal with (you are going to need litres of raw material)
Add calcium chloride (chalk + hcl) -> precipitates calcium cyanate because urea <--> ammonium cyanate
Filter off, and powder up.
Boil with ammonium sulphate solution to form precipitate of calcium sulphate and urea solution.
Filter off calcium sulphate, and boil down. Urea will come out of solution.
Phosphorus:
Boil down urine to solid, and keep heating until no more change occurs. Grind up the white solid (chuck the black stuff) with sand and aluminium
powder, then heat in a retort to the highest temperature you can reach. The hotter the better. Condense all vapours under water. Hopefully, you will
have some (impure) white phosphorus.
Good luck! Let me know if the phosphorus one works, if you ever do it.
[Edited on 2-1-2014 by eidolonicaurum]
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eidolonicaurum
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I just saw an earlier post of yours, and it looks like you are going to need to get some more chemicals from somewhere if you want to do the
interesting things. I mean, theres a suprising amount you can get OTCwise, but you just have to know where to look. Its also quite ridiculous how much
you can get on ebay/amazon etc. Another place is sites where schools get their chemicals from, like philip harris, though they can be more/quite
expensive.
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bfesser
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Thread Pruned
2-1-2014 at 07:31 |
bfesser
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Thread Split
5-1-2014 at 09:46 |
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