NMR can be used
as either a qualitative
or a quantitative
analysis tool. In qualitative mode, peak positions are correct, but
the peak areas will not necessarily be accurate relative to one another.
In other words, a resonance arising from three protons may not be three
times as large as a peak arising from only one proton. Because of the
way the experimental parameters must be chosen, quantitative spectra
may take signficantly longer to acquire, but the relative areas will
It is relatively
easy to achieve quantitative 1H spectra, so most standard experiments
are set up to give accurate results for common organic molecules.