Suppression of phase anomalies and sidebands on 13c NMR spectra obtained with the steady-state free precession sequence

Química Nova

Empresa Brasileira de Pesquisa Agropecuária, São Carlos, Brasil¹  Universidade de São Paulo, São Carlos, Brasil¹  Santos, Poliana Macedo dos¹  Colnago, Luiz Alberto¹  Universidade de São Paulo, São Carlos¹  Souza, André Alves de¹ 

关键词: 13C NMR;    Steady State Free Precession;    phase anomalies and sidebands.;   

DOI  :  10.1590/S0100-40422010000400034

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The Steady-State Free Precession (SSFP) sequence has been widely used in low-field and low-resolution imaging NMR experiments to increase the signal-to-noise ratio (s/n) of the signals. Here, we analyzed the Scrambled Steady State - SSS and Unscrambled Steady State - USS sequences to suppress phase anomalies and sidebands of the 13C NMR spectrum acquired in the SSFP regime. The results showed that the application of the USS sequence allowed a uniform distribution of the time interval between pulses (Tp), in the established time range, allowing a greater suppression of phase anomalies and sidebands, when compared with the SSS sequence.

【 授权许可】

Unknown