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Salt plates in spectroscopy
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Topic: Salt plates in spectroscopy (Read 4621 times)
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kb2009
New Member
Posts: 4
Mole Snacks: +0/-0
Salt plates in spectroscopy
«
on:
January 31, 2008, 11:11:15 AM »
In some IR spectra where the salt plates being used
have been left out
, a broad peak appears at around 3500 cm-1, even though the sample being analyzed does not contain an alcohol subsitituent
Why does this peak occur?
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Arkcon
Retired Staff
Sr. Member
Posts: 7367
Mole Snacks: +533/-147
Re: Salt plates in spectroscopy
«
Reply #1 on:
January 31, 2008, 11:53:50 AM »
You're not 'sposed ta leave the salt plates out? Damn, I better wash 'em before the boss finds out. What brand of soap do you use?
to O.P.: report all flaws in my responce
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Hey, I'm not judging. I just like to shoot straight. I'm a man of science.
optimusprime
Regular Member
Posts: 17
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Re: Salt plates in spectroscopy
«
Reply #2 on:
January 31, 2008, 03:03:48 PM »
Salt plates are hygroscopic, and hence should be kept in a desiccator at all times.
Can you figure out what the O-H peak you're seeing is now?
Hint:
It's water.
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ARGOS++
Sr. Member
Posts: 1489
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Re: Salt plates in spectroscopy
«
Reply #3 on:
January 31, 2008, 04:15:06 PM »
Dear
Optimusprime
;
I agree with you (your Hint): 3600 – 3200 cm
-1
(s) a very broad band of “all” different Hydrogen bonds. (Rarely one or the other additional sharp peaks.)
“
Bond strength
” corresponds ‘nicely’ with frequency
-1
.
Good Luck!
ARGOS
++
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Salt plates in spectroscopy