Integration L4

Question 1

What does the area of under the peak mean in nmr

Answer 1

area under a peak is proportional to the number of nuclei giving rise to the peak

Question 2

What does integration of peaks give

Answer 2

Integration of peaks gives relative intensities, cannot use signal heights due to differing linewidths. Ratio of the protons behind each signal

Question 3

What is the accuracy of integration

Answer 3

Typically 5-10% error in measurement

Question 4

What is the error in integration caused by

Answer 4

Poor signal to noise ratio
Saturation effect - nuclei do not fully relax
Isotope satellites