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Improved method for pulse width calibration in indirectly detected experiments
Author(s) -
Esposito G.,
Nadalin L.,
Verdone G.,
Corazza A.,
Viglino P.,
Fedrigo M.
Publication year - 2001
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.833
Subject(s) - chemistry , pulse sequence , pulse (music) , calibration , sequence (biology) , analytical chemistry (journal) , field (mathematics) , nuclear magnetic resonance , magnetization , computational physics , resonance (particle physics) , pulse width modulation , molecular physics , optics , atomic physics , magnetic field , physics , chromatography , quantum mechanics , mathematics , detector , biochemistry , voltage , pure mathematics
A new sequence for calibrating the pulse width in indirectly detected experiments is described. It uses a field gradient pulse to destroy the transverse magnetization from nuclei that are not coupled to the indirectly detected species. With low natural abundance heteronuclei such as 13 C or 15 N, the latter component is responsible for a very intense resonance, with large dispersive tails, that hinder the observation of the intensities of the satellite peaks, especially at the null point. The proposed sequence improves the accuracy of the calibration owing to the excellent suppression of the unwanted dispersive signals. We named the sequence ROSSANA, i.e. RO tating S atellite S elective A cquisition at N atural A bundance. Copyright © 2001 John Wiley & Sons, Ltd.