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November 01, 2025, 12:31:46 pm
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Author Topic: Infrared, NMR and Mass Spec  (Read 2070 times)  Share 

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happyhappyland

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Infrared, NMR and Mass Spec
« on: April 08, 2010, 09:30:07 pm »
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How much theory of each of these instruments do we need to know for the exam? So far Ive been focusing on just how to read and interpret the graphs and havnt been working on how much they actually work.
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simonhu81292

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Re: Infrared, NMR and Mass Spec
« Reply #1 on: April 08, 2010, 09:35:19 pm »
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yeah .. basically read and interpret the graph...
identifying the substance under analysis ..
i think that is as far as it goes
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monokekie

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Re: Infrared, NMR and Mass Spec
« Reply #2 on: April 08, 2010, 09:41:25 pm »
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For all of the three instruments, you need to be familiar with interpreting their graphs.

You need to know the instruments of IR and Mass Spec really well, because you may be asked to name some components or discuss some logic behind them.

For NMR, you need to know the concept of nuclear magnetic resonance and understand the purpose of tetramethylsilane

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well the limit can turn into a threshold..

kenhung123

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Re: Infrared, NMR and Mass Spec
« Reply #3 on: April 08, 2010, 09:46:59 pm »
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Do we need to know like detailed stuff about each analytical technique such as how? what is involved? the equipment
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superflya

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Re: Infrared, NMR and Mass Spec
« Reply #4 on: April 08, 2010, 10:06:44 pm »
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Quote from: kenhung123 on April 08, 2010, 09:46:59 pm
Do we need to know like detailed stuff about each analytical technique such as how? what is involved? the equipment

yes.
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happyhappyland

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Re: Infrared, NMR and Mass Spec
« Reply #5 on: April 09, 2010, 08:38:52 am »
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Quote from: superflya on April 08, 2010, 10:06:44 pm
Quote from: kenhung123 on April 08, 2010, 09:46:59 pm
Do we need to know like detailed stuff about each analytical technique such as how? what is involved? the equipment

yes.

Even the explanation of the pulsed light in IR and AAS with all the mirrors and reference cells etc?
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tram

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Re: Infrared, NMR and Mass Spec
« Reply #6 on: April 09, 2010, 09:09:43 am »
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pulsed light defs, dunno about the mirrors and reference cells
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superflya

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Re: Infrared, NMR and Mass Spec
« Reply #7 on: April 09, 2010, 03:05:15 pm »
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id learn em just to be safe.
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physics

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Re: Infrared, NMR and Mass Spec
« Reply #8 on: April 09, 2010, 08:58:24 pm »
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in one of the pass papers they asked for the purpose of the light and the flame and the monochromator and the dectector :P one mark each ! omg. :P
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superflya

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Re: Infrared, NMR and Mass Spec
« Reply #9 on: April 09, 2010, 09:12:07 pm »
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Quote from: annahinh on April 09, 2010, 08:58:24 pm
in one of the pass papers they asked for the purpose of the light and the flame and the monochromator and the dectector :P one mark each ! omg. :P

isnt that a good thing...easy marks?
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kenhung123

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Re: Infrared, NMR and Mass Spec
« Reply #10 on: April 09, 2010, 09:18:27 pm »
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Gosh, why is infrared spectra so weird? The absorbance decreases and the wave number decreases on the axis
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physics

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Re: Infrared, NMR and Mass Spec
« Reply #11 on: April 09, 2010, 09:19:56 pm »
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Quote from: superflya on April 09, 2010, 09:12:07 pm
Quote from: annahinh on April 09, 2010, 08:58:24 pm
in one of the pass papers they asked for the purpose of the light and the flame and the monochromator and the dectector :P one mark each ! omg. :P

isnt that a good thing...easy marks?
i dont get it so its hard --"
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kenhung123

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Re: Infrared, NMR and Mass Spec
« Reply #12 on: April 09, 2010, 09:44:30 pm »
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BTW, there is no point learning what they do I don't think they are interested in that...perhaps learn the important features such as differences in colorimetry, UV, AAS, purposes of them, what they can be used for etc
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boysenberry

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Re: Infrared, NMR and Mass Spec
« Reply #13 on: April 13, 2010, 10:34:10 pm »
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Do you think it's worth memorising that grid on page 120 of the Heinemann Chemistry 2 textbook?
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naved_s9994

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Re: Infrared, NMR and Mass Spec
« Reply #14 on: April 13, 2010, 10:37:56 pm »
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Quote from: boysenberry on April 13, 2010, 10:34:10 pm
Do you think it's worth memorising that grid on page 120 of the Heinemann Chemistry 2 textbook?

LOL no!
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