On the practical aspects of recording wideline QCPMG NMR spectra

Ivan Hung; Zhehong Gan

doi:10.1016/j.jmr.2010.03.001

On the practical aspects of recording wideline QCPMG NMR spectra

J Magn Reson. 2010 Jun;204(2):256-65. doi: 10.1016/j.jmr.2010.03.001. Epub 2010 Mar 6.

Authors

Ivan Hung¹, Zhehong Gan

Affiliation

¹ Center of Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, FL 32310, USA.

PMID: 20359918
DOI: 10.1016/j.jmr.2010.03.001

Abstract

The practical aspects of applying CPMG for acquisition of wideline powder patterns are examined. It is shown that most distortions/modulations of spikelet spectra can be traced to the incoherent signal averaging from multiple coherence transfer pathways. A strategy for minimizing these distortions/modulations is described. Also, a few interesting observations regarding the implementation of the wideline WURST-QCPMG experiment are presented, namely the accumulation of second-order signal phase and the effects of varying the sweep rate and rf field of chirp pulses.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Algorithms*
Computer Simulation
Magnetic Resonance Spectroscopy / methods*
Models, Chemical*
Signal Processing, Computer-Assisted*