Normally, I am quite busy running NMR on "legit" samples, and prefer not to waste any NMR time. But some time back, I had just replaced a board on one of our instruments and needed to test the spectrometer out. I also happened to be drinking a can of Mountain Dew at the time :-) You can see some of the results below. These are "quick and dirty" runs, and not meant to be high quality by any means. In fact. they are a good example of what happens when you use a sample that contains a mixture of many substances, some abundant and others trace, without careful use of the digital filter and spectral width parameters.

Sample: Mountain Dew. H2O removed by vacuum and heat. Redissolved in D2O, and re-dried by vacuum/heat. The sample became a hard pellet that could be stretched or deformed only with considerable force. A small amount was then dissolved in D2O and placed in the NMR tube.

1H NMR of Mountain Dew:

13C NMR of Mountain Dew:

DQF-COSYgp of Mountain Dew:

1H-13C HMQC of Mountain Dew: