In this study, the thermal stability of phospholipids (PLs) extracted from coffee beans was investigated. Chemical analysis was used to obtain information about the effect of heat treatment on the content of PLs in roasted coffee beans. Normal phase high-performance liquid chromatography (HPLC) combined with evaporative light scattering detector (ELSD) was applied to identify and quantify the classes of PLs. The results showed that only two PLs (phosphatidylinositol (PI), and phosphatidylcholine (PC)) were detected in coffee. One gram total lipid of green coffee contained 7.79 mg of PI, 9.6 mg of PC. As the duration of heat treatment was increased, there was a decrease in the content of PI and PC. With increases in temperature at various durations, the content of PI and PC was significantly decreased. Moreover, PI has been found to be more thermo sensitive than PC.
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| http://dx.doi.org/10.1016/j.foodchem.2013.06.056 | DOI Listing |
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