Pulsed Fourier Transform NMR Spectroscopy

It can thus be seen that the signal-to-noise ratio, S/N, will grow at a rate proportional to the square root of the number of scans, and after addition of successive scans, the peaks gradually become more intense and emerge out of the noise on accumulation of a sufficiently large number of scans. While this improves the spectrum to some extent, the process is inefficient since it is limited by the long scan time involved in the recording of each spectrum on continuous-wave instruments. 

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Fourier transform spectroscopy in the radio frequency region has been applied most importantly in pulsed Fourier transform NMR spectroscopy, which is not a subject which... 

The introduction of additional techniques such as Pulsed Fourier Transform NMR spectroscopy (PFT-NMR) has considerably increased the sensitivity of the method, allowing many magnetic nuclei which may be in low abundance, including 13C, to be studied. The additional data available from these methods allow information on polymer structure, conformation and relaxation behaviour to be obtained (1.18.20). 

D. Shaw, Pulsed Fourier Transform NMR Spectroscopy, Elsevier Scientific Publishing Co., Amsterdam (1979). 

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