Drift Correction

Drift Correction: The DC (Drift Current) component is the zero frequency (F0) of the spectrum, which is proportional to the sum of all data points in the FID; if F0 is different to zero; a glitch signal (spurious peak) will appear in the centre of the spectral window. Both real and imaginary parts of the FID should decay to zero at the end of acquisition, but sometimes this "zero" is different and the offset may not be the same for both channels. Mnova corrects this spurious peak by default prior to Fourier Transform, although you can find and customize this tool (by selecting the number of tail points of the FID to determine the mean DC level), as you can see below:

You can automatically apply a drift correction when loading your NMR datasets by following the menu 'File/Preferences/NMR/Import' and checking the applicable box.