caracterização da pureza de fosfatidilcolina da soja através de rmn de ¹h e de 31p characterization of soybean phosphatidylcholine purity by ¹h and 31p nmr

caracterização da pureza de fosfatidilcolina da soja através de rmn de ¹h e de 31p characterization of soybean phosphatidylcholine purity by ¹h and 31p nmr

;Omar Mertins;Marcelo Sebben;Paulo Henrique Schneider;Adriana Raffin Pohlmann;Nádya Pesce da Silveira
greece and rome 2008 Vol. 31 pp. 1856-1859
220
mertins2008qumicacaracterizao

Abstract

A strategy is proposed to evaluate the purity of phosphatidylcholine from soybean lecithin, obtained by extraction or column chromatography, using the integrals ratio of ¹H NMR spectra. Integrals of methylene signals, around 1.3 and 1.6 ppm, are added and divided by the integral of the choline methyl groups, around 3.3 ppm. Before purification, a ratio of 19.68±1.37 was determined. Using extraction, a ratio of 10.70±0.61 was found, while from column chromatography, a value of 2.99±0.25 was detected. 31P NMR of standard phosphatidylcholine showed signals at -0.2 and -0.9 ppm, whereas the purified one showed a single signal at -0.9 ppm.

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134206
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10.1590/S0100-40422008000700043
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