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Substance detection techniques
 

offline stefano_azevedo from Pindorama (Brazil) on 2006-11-18 12:21 [#02004406]
Points: 4396 Status: Regular



Smell, taste...

oh and the structures are known mostly from spectroscopy,
there are several types, and its quite tricky. One example
is to break up the molecule by firing electrons at it, and
then it is possible to measure the fragments you get by
their mass. considering we know the masses of any given
atom, you can look at all the different fragment masses and
try to piece together what they came from. For example if
you see a fragment with a mass of 15 you can tell there is
a
methyl group (CH3) like those two on the right side of the
psylocybin diagram, because C=12 and H=1. Then if you see
also a 29, then perhaps that methyl is stuck on to a CH2 in
the whole molecule... and so on.


 

offline mappatazee from ¨y¨z¨| (Burkina Faso) on 2006-11-18 14:39 [#02004496]
Points: 14294 Status: Lurker



And?


 

offline hanal from k_maty only (United Kingdom) on 2006-11-18 14:43 [#02004498]
Points: 13379 Status: Lurker | Show recordbag



`


Attached picture

 

offline stefano_azevedo from Pindorama (Brazil) on 2006-11-18 15:02 [#02004502]
Points: 4396 Status: Regular



this thread refers to Dannn_


 

offline hanal from k_maty only (United Kingdom) on 2006-11-18 15:06 [#02004505]
Points: 13379 Status: Lurker | Followup to stefano_azevedo: #02004502 | Show recordbag



no,we must all share in this thread-share the love


 

offline stefano_azevedo from Pindorama (Brazil) on 2006-11-19 13:31 [#02004818]
Points: 4396 Status: Regular



why are some chemistry related threads more sucessful than
others?


 

offline goDel from ɐpʎǝx (Seychelles) on 2006-11-19 13:33 [#02004820]
Points: 10225 Status: Lurker



it's a temporary thing. a dip in the force, so to speak


 

offline goDel from ɐpʎǝx (Seychelles) on 2006-11-19 13:37 [#02004828]
Points: 10225 Status: Lurker



thank you, qrter

any idea what tolst and phobs were up to? did they fell
asleep...TOGETHER????


 

offline DirtyPriest from Copenhagen (Denmark) on 2006-11-19 13:38 [#02004830]
Points: 5499 Status: Lurker



Just blurting out random facts isnt exactly an discussion
starter


 

offline goDel from ɐpʎǝx (Seychelles) on 2006-11-19 13:38 [#02004831]
Points: 10225 Status: Lurker



:O


 

offline stefano_azevedo from Pindorama (Brazil) on 2006-11-19 13:44 [#02004847]
Points: 4396 Status: Regular | Followup to goDel: #02004828



maybe they did like those threads


 

offline Ezkerraldean from the lowest common denominator (United Kingdom) on 2006-11-19 13:45 [#02004849]
Points: 5733 Status: Addict



substance detection............?
something we use in geology:

mass spectrometers - sort out different isotopes of the same
element by ionising it and flinging it through an
electromagnet in a curved vacuum tube. they cost about £2
million each. they dont let first-years play with it. i
wonder why.



 

offline goDel from ɐpʎǝx (Seychelles) on 2006-11-19 13:46 [#02004852]
Points: 10225 Status: Lurker | Followup to stefano_azevedo: #02004847



perhaps. and perhaps we could start another couple. just to
see what happens. you go first. i'll support you


 

offline stefano_azevedo from Pindorama (Brazil) on 2006-11-19 13:47 [#02004853]
Points: 4396 Status: Regular | Followup to Ezkerraldean: #02004849



so you are a geologist. could you tell me a little about
your job?


 


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