University of Ottawa NMR Facility Web Site

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Thursday, December 20, 2007

Improving Your Baseline Correction

Spectral baselines are often corrected in Bruker's software by using the "abs" command after Fourier transformation. This correction is not always well suited to the data. Another method of getting flatter baselines is to define specific frequency limits "absf1" and "absf2" over which the baseline will be corrected and then use the "absf" command rather than the "abs" command. The smaller the difference between "absf1" and "absf2", the better the correction will be. Below is an example where "absf1" and "absf2" are defined by the region in pink.