A detailed analysis of the proton high-field (600 MHz) NMR spectra of tomato juice and pulp is reported for the first time. A combination of J-resolved, COSY, TOCSY, DOSY, 1H-13C HSQC and 1H-13C HMBC 2D sequences was used to assign each spin system and to separate the components of the complex patterns in the 1D overlapped proton spectra. To obtain resolved proton spectra of tomato pulps the high-resolution magic angle spinning technique was used; a comparison with the liquid-state NMR spectra of the corresponding juices was accomplished. On the basis of the assignments made, the chemical composition of tomato juices from two cultivars (Red Setter and Ciliegino
Proton high-field NMR study of tomato juice
Sobolev AP;
2003
Abstract
A detailed analysis of the proton high-field (600 MHz) NMR spectra of tomato juice and pulp is reported for the first time. A combination of J-resolved, COSY, TOCSY, DOSY, 1H-13C HSQC and 1H-13C HMBC 2D sequences was used to assign each spin system and to separate the components of the complex patterns in the 1D overlapped proton spectra. To obtain resolved proton spectra of tomato pulps the high-resolution magic angle spinning technique was used; a comparison with the liquid-state NMR spectra of the corresponding juices was accomplished. On the basis of the assignments made, the chemical composition of tomato juices from two cultivars (Red Setter and CilieginoI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
