Two new methodologies were established for the analysis of free sterols/stanols and of intact steryl/stanyl fatty acid and phenolic acid esters in various plant foods. The first method was based on a solid-phase extraction for the fractionation of the lipids into several sterol classes, followed by the analysis via gas chromatography. The other approach was based on the on-line coupling of liquid chromatography and gas chromatography, which enabled the simultaneous analysis of free sterols/stanols and steryl/stanyl fatty acid esters, and additionally of trans-steryl/stanyl ferulic acid esters. Both methods were applied to the analysis of the natural variability of the contents and distribution patterns of free sterols/stanols and steryl/stanyl esters in a total of 127 samples of cereal grains, nuts, and edible plant oils.
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Two new methodologies were established for the analysis of free sterols/stanols and of intact steryl/stanyl fatty acid and phenolic acid esters in various plant foods. The first method was based on a solid-phase extraction for the fractionation of the lipids into several sterol classes, followed by the analysis via gas chromatography. The other approach was based on the on-line coupling of liquid chromatography and gas chromatography, which enabled the simultaneous analysis of free sterols/stano...
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