Question

I have run Gas Chromatography, NMR spectroscopy, or Distillation to identify the unknown compoments of mixture and % composition of mixture. But the data contradict to each other and so what could be the reasons for the discrepancy?

Answer 1

Difference between gas chromatography and fractional distillation is that the fractional distillation is used to separate components on a very large scale whereas gas chromatography technique is applied to very small scale of the oreder of microscale .

Now, the NMR spectroscopy do not depend upon the boiling point of the substrate just like in distillation and gas chromatography but it depends on their magnetic properties that's why there is difference in the obtained values