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First-Data-Point problem and the baseline distortion in Fourier-transformNMR spectroscopy with simultaneous sampling
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SYSNO ASEP 0205517 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title First-Data-Point problem and the baseline distortion in Fourier-transformNMR spectroscopy with simultaneous sampling Author(s) Starčuk jr., Zenon (UPT-D) RID, ORCID, SAI
Bartušek, Karel (UPT-D) RID, ORCID, SAI
Starčuk, Zenon (UPT-D) RIDSource Title Journal of Magnetic Resonance. A - ISSN 1064-1858
Roč. 108, - (1994), s. 177 - 188Number of pages 12 s. Language eng - English Country US - United States Keywords baseline distortion ; NMR Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering CEZ AV0Z2065902 - UPT-D Annotation The baseline distortions often arising in spectra after linear phase correction have often been attributed to an improper value of the first acquired data point of the free-induction decay. However, correction of this value by multiplying it by a certain factor depending on the timing of the excitation sequence has not proved to be reliable unless some very specific conditions are met. In this article, the origin of these distortions is thoroughly examined in both the frequency and the time domain. It is shown that the problem can be explained generally as an improper resampling of the original signal as a result of the linear phase correction. A way of avoiding these artifacts is proposed. However, it is shown that generally theproper correction must affect the whole signal in a complex way and that suitable timing of the experiment is highly desirable. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2003
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