Physics Help Forum What region in NMR spectrum should I choose for integration?

 Nuclear and Particle Physics Nuclear and Particle Physics Help Forum

 May 8th 2019, 07:55 AM #1 Junior Member   Join Date: May 2019 Posts: 4 What region in NMR spectrum should I choose for integration? I have nuclear magnetic resonance spectrum. The vertical axis is intensity, and the horizontal axis is index. I need to find integral under the peak. But I am not sure, what region should I choose for integration - region 1 or region 2? Please find attached the spectrum. Attached Thumbnails
May 8th 2019, 08:04 AM   #2

Join Date: Apr 2008
Location: On the dance floor, baby!
Posts: 2,616
 Originally Posted by Spectra92 I have nuclear magnetic resonance spectrum. The vertical axis is intensity, and the horizontal axis is index. I need to find integral under the peak. But I am not sure, what region should I choose for integration - region 1 or region 2? Please find attached the spectrum.
You would use region 1 as it is a much higher peak than the rest of region 2. Generally we use the idea of an average value of the peak times the domain of the index. This can be found using the average of a function in Calculus but it is much simpler to work with the "width at half maximum" of the peak times the domain of the index. This is generally close enough to work with.

-Dan
__________________
Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup.

See the forum rules here.

 May 8th 2019, 08:07 AM #3 Junior Member   Join Date: May 2019 Posts: 4 Thank you!

 Tags choose, integration, nmr, nmr spectrum, region, spectrum

 Thread Tools Display Modes Linear Mode

 Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post ling233 Thermodynamics and Fluid Mechanics 1 May 6th 2016 09:29 PM ling233 Thermodynamics and Fluid Mechanics 1 Mar 1st 2016 11:33 AM rgrand Atomic and Solid State Physics 0 Jul 2nd 2013 06:24 AM williams1321 Quantum Physics 1 Jun 7th 2009 10:56 PM