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- W2049595105 abstract "In this work, liquid-liquid extraction (LLE) and solid phase extraction (SPE), of polyphenols from a VOO sample were optimised by a Plackett-Burman experimental design; then the two extraction techniques capabilities were compared. By using HPLC-DAD, the extraction ability of SPE with the diol phase and LLE were similar. The two methods were further evaluated with ultra HPLC-ESI QToF in negative ion mode by recoveries of standards and matched comparison of the peak area of 40 identified and 27 unidentified compounds. Conclusions indicate that LLE gives better recoveries for highly polar, non-polar, and some polyphenols suspected to contain a nitrogen atom, while for the others the two methods seem to be equally suitable. The presence of nitrogen-containing polyphenols was confirmed in positive ionisation mode in LLE extract, whereas in the SPE extract they were not present. One of them was tentatively identified as a compound containing tyrosine and methyl-decarboxymetyl-eleanoic acid moieties." @default.
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- W2049595105 date "2014-09-01" @default.
- W2049595105 modified "2023-09-30" @default.
- W2049595105 title "Comparison of extraction methods for the identification and quantification of polyphenols in virgin olive oil by ultra-HPLC-QToF mass spectrometry" @default.
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- W2049595105 doi "https://doi.org/10.1016/j.foodchem.2014.02.130" @default.
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