90 Degree Pulse Width Lab: Adjusting Pulse Width for Optimal Spectrum, Lab Reports of Chemistry

Download 90 Degree Pulse Width Lab: Adjusting Pulse Width for Optimal Spectrum and more Lab Reports Chemistry in PDF only on Docsity! 90 degree pulse width lab. file:///F:/pw90.html 1 of 2 2/17/2008 10:23 AM Lab on 90o Pulse Width You may work in small groups on the lab. Put all your names on the lab report. EFT 60 directions- Put in the 1-98 sample and setup for H-1. Change rg to 30. Tune the instrument i f it is needed. Obtain the spectrum as usual but process the data in NUTS using a2 and phase it-ap. Do it with the default pw (17.5 ms) at first. Use dc in nuts to adjust the spectrum to the middle of the screen so you can see negative peaks (by adjusting the left scroll bar) and set the v ertical scale so that this spectrum is about 80-90% of full scale (by adjusting the right scroll bar). After this adjustment hit the enter key to retur n to the main menu. Then fix the scale with FS command.. Plot the spectrum -pl. The resulting spectrum should look similar to this. Now change the pw in pnmr to 3*the default ie pw =52.5 ms. Process with the a2 command. Do not phase, do not use the FS command. Do not change the scale. Plot it. It should be about the maximum negative spectrum. Your resulting spectrum should look similar to this.