Separation of the integrals of partially resolved doublets based on chemical shift evolution using non-selective RF pulses

摘要

New pulse schemes are presented for separation of integrals of partially resolved doublets using non-selective RF pulses. The separation is based on the evolution under the influence of chemical shift leading to two orthogonal magnetization components. The selection of one of these orthogonal signals is then achieved by retaining it in the transverse plane while converting the other into unobservable longitudinal magnetization. Alternatively, the desired signal is converted into longitudinal magnetization while the other signal is dephased using gradients. Subsequently, the longitudinal magnetization is converted to detectable signal. Experimental results are demonstrated, separately, using H-1 and C-13 NMR. (C) 2004 Elsevier B.V. All rights reserved.