Elimination of baseline slope in time-averaged nuclear quadrupole resonance spectra

Abstract

A simple method is described for eliminating baseline slope when using a time-averaging computer to record nuclear quadrupole resonance spectra. A number of frequency sweeps are accumulated in the computer store, and then the same number of sweeps made with a small magnetic field at the sample are subtracted. The result is that only field-dependent effects such as nuclear quadrupole resonance remain. As an example, recordings of one of the 35Cl nuclear quadrupole resonance lines in trichloroborazole are reproduced which show that the line is in fact a doublet.