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Author: Subject: Got my own NMR
Bmoore55
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[*] posted on 30-4-2020 at 14:48


It’s not that difficult to run once you understand the quirks of the user interface. It’s not perfect but it’s a heck of a lot better than not having any NMR ;)
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Texium
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[*] posted on 30-4-2020 at 15:27


If you integrate one of the 1 proton peaks of the ibuprofen instead of the acetone as your “1.00”, assigning the ibuprofen peaks will be much easier, and you could roughly quantify the amount of the residual solvents in your sample. Looks great though!

Also I’m going to go ahead and merge this with your other thread. I don’t see why two are needed.




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Texium
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30-4-2020 at 15:28
Bmoore55
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[*] posted on 30-4-2020 at 15:30


Thanks! It has been a good 10 years since I last worked up NMR data myself so I’m very rusty.
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Bmoore55
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[*] posted on 30-4-2020 at 17:50


I went back and did the integration like you suggested and it worked like a charm. Molar ratio calculation is as follows:

Ibuprofen: 1
DCM: 0.1678
Acetone: 0.4572

If I back calculate from the molar mass then the Ibuprofen should make up 83.49%, the DCM is 5.77%, and the acetone is 10.75% by weight.
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Texium
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[*] posted on 30-4-2020 at 20:00


Cool, could you post an image of the updated spectrum?



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Bmoore55
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[*] posted on 1-5-2020 at 06:37




Ibuprofen.jpg - 69kB
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