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Análise do teor e da qualidade dos lipídeos presentes em sementes de oleaginosas por rmn de baixo campo

2014; Brazilian Chemical Society; Volume: 37; Issue: 1 Linguagem: Inglês

10.1590/s0100-40422014000100003

1678-7064

André F. Constantino, Valdemar Lacerda, Reginaldo B. dos Santos, Sandro J. Greco, Renzo C. Silva, Álvaro Cunha Neto, Lúcio L. Barbosa, Eustáquio Vinícius Ribeiro de Castro, Jair C. C. Freitas,

Coconut Research and Applications

OILSEEDS BY LOW-FIELD NMR.To choose among the variety of oleaginous plants for biodiesel production, the oil content of several matrices was determined through different low-field 1 H nuclear magnetic resonance (NMR) experiments with varied pulse sequences, namely single-pulse, spin-echo, CPMG, and CWFP.The experiments that involved the first three sequences showed high correlation with each other and with the solvent extraction method.The quality of the vegetable oils was also evaluated on the basis of the existing correlation between the T 2 values of the oils and their properties, such as viscosity, iodine index, and cetane index.These analyses were performed using HCA and PCA chemometric tools.The results were sufficiently significant to allow separation of the oleaginous matrices according to their quality.Thus, the lowfield 1 H NMR technique was confirmed as an important tool to aid in the selection of oleaginous matrices for biodiesel production.