The qualitative and quantitative research on glycolipids compounds was analyzed by means of the flight time ultra-high performance liquid chromatography tandem mass spectrometry(UPLC-Q-TOF-MS) technology.The mass spec...The qualitative and quantitative research on glycolipids compounds was analyzed by means of the flight time ultra-high performance liquid chromatography tandem mass spectrometry(UPLC-Q-TOF-MS) technology.The mass spectrometry was performed in reflective time-of-flight using electron spraying ionization.The components in monoglycosyldiglycerides(MGDG) and diglycosyldiglycerides(DGDG) were determined in positive ion mode,and the sulfoquinovosyl diacylglycerol(SQDG) were analyzed in negative ion mode.The results showed that each component in golycolipids can be separated effectively with gradient elution in the BEH C18 column.The proportion of each components accounts for total glycolipids can be determined by using degree elution.展开更多
Monogalactosyldiacylglycerols(MGDGs)have potential applications in food products,cosmetics and pharmaceuticals.MGDGs from microalgae with high amounts of polyunsaturated fatty acids(PUFAs)have potential functions,whic...Monogalactosyldiacylglycerols(MGDGs)have potential applications in food products,cosmetics and pharmaceuticals.MGDGs from microalgae with high amounts of polyunsaturated fatty acids(PUFAs)have potential functions,which arise the interest of the researchers.MGDGs were prepared by silica gel column chromatography with the appropriate mobile phase,while due to the similarity to molecular structure of MGDGs,digalactosyldiacylglycerols(DGDGs)were the most difficult impurities to separate during the extraction process of MGDGs from Nannochloropsis oceanica IMET1 and Arthrospira platensis.In order to obtain MGDGs from microalgae using low toxic solvent system,a novel material Click thiol-ene cysteine(Click TE-Cys)was employed to achieve its selective separation by differentiation of the hydrophilic interaction.The mixture of MGDGs and DGDGs standards were separated from each other by Click TE-Cys solid phase extraction(SPE),which was further confirmed by the result of LC-MS.The molecular interaction of MGDGs and DGDGs with Click TE-Cys demonstrated that DGDGs had more hydrogen bonds with Click TE-Cys material,which might cause a higher hydrophilic interaction.In this study,the Click TE-Cys material exhibited higher hydrophilicity with DGDGs and effectively separated MGDGs from 4 species microalgae by‘flow-through'mode using ethanol as mobile phase.展开更多
文摘The qualitative and quantitative research on glycolipids compounds was analyzed by means of the flight time ultra-high performance liquid chromatography tandem mass spectrometry(UPLC-Q-TOF-MS) technology.The mass spectrometry was performed in reflective time-of-flight using electron spraying ionization.The components in monoglycosyldiglycerides(MGDG) and diglycosyldiglycerides(DGDG) were determined in positive ion mode,and the sulfoquinovosyl diacylglycerol(SQDG) were analyzed in negative ion mode.The results showed that each component in golycolipids can be separated effectively with gradient elution in the BEH C18 column.The proportion of each components accounts for total glycolipids can be determined by using degree elution.
基金supported by the National High Technology Research and Development Program‘863’(No.14AA022004)the Key Research and Development Plan in Shandong Province(No.YYSP016)the National Natural Science Foundation of China(No.21505131)。
文摘Monogalactosyldiacylglycerols(MGDGs)have potential applications in food products,cosmetics and pharmaceuticals.MGDGs from microalgae with high amounts of polyunsaturated fatty acids(PUFAs)have potential functions,which arise the interest of the researchers.MGDGs were prepared by silica gel column chromatography with the appropriate mobile phase,while due to the similarity to molecular structure of MGDGs,digalactosyldiacylglycerols(DGDGs)were the most difficult impurities to separate during the extraction process of MGDGs from Nannochloropsis oceanica IMET1 and Arthrospira platensis.In order to obtain MGDGs from microalgae using low toxic solvent system,a novel material Click thiol-ene cysteine(Click TE-Cys)was employed to achieve its selective separation by differentiation of the hydrophilic interaction.The mixture of MGDGs and DGDGs standards were separated from each other by Click TE-Cys solid phase extraction(SPE),which was further confirmed by the result of LC-MS.The molecular interaction of MGDGs and DGDGs with Click TE-Cys demonstrated that DGDGs had more hydrogen bonds with Click TE-Cys material,which might cause a higher hydrophilic interaction.In this study,the Click TE-Cys material exhibited higher hydrophilicity with DGDGs and effectively separated MGDGs from 4 species microalgae by‘flow-through'mode using ethanol as mobile phase.
