Abstract
Sources of artifacts in Hadamard spectra were investigated and identified as insufficient suppression of signals from solvent, protons attached to 12C atoms and error signals caused by non-ideal excitation and the subsequent Hadamard transformation. Pulsed field gradients (PFG) effectively eliminate the former error signals while re-optimized Hadamard-shaped pulses produce practically ideal excitation and Hadamard transformation affords artifact-free spectra. Long-range 13C–1H coupling constants of 1,6-anhydro-β-D-galactopyranoside and 3-acetylpyridine were determined by using a PFG pulse sequence and re-optimized Hadamard-8 shaped pulses.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Paper version not known
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
