To zero fill on a Bruker spectrometer, the "si" parameter is increased to a value greater than the number of points collected in the free induction decay. On a Varian spectrometer, the corresponding parameter is "fn".
Thursday, November 15, 2007
Zero Filling
Zero filling is a data processing technique where zero points are appended to the free induction decay before Fourier transformation. The effect of zero filling is to increase the digital resolution in the spectrum. Since the zeros contain no new information, there is no new information added to the spectrum. You can think of it as artificially increasing the acquisition time after the data collection without adding any new information or true resolution to the spectrum.
To zero fill on a Bruker spectrometer, the "si" parameter is increased to a value greater than the number of points collected in the free induction decay. On a Varian spectrometer, the corresponding parameter is "fn".
To zero fill on a Bruker spectrometer, the "si" parameter is increased to a value greater than the number of points collected in the free induction decay. On a Varian spectrometer, the corresponding parameter is "fn".
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7 comments:
consider adding a comment that the resolution increase is only "apparent". Zero-filling has only a cosmetic effect.
Will zero filling affect quantitative NMR results?
W@hZai,
The integral of an NMR resonance is determined by the first point of the FID. Therefore adding zeroes (Zero filling) at the end of the FID has no effect quantitative results.
Glenn
Similar to W@hZai's question, does backward linear prediction affect qNMR?
Anonymous,
Provided that backward linear prediction is accurate, the quantitative nature of the data should not be affected.
Glenn
Are there any negative effects of zero filling?
Unknown,
The only negative effect of zero filling is the additional computer resources required to accommodate larger data files.
Glenn
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