, Volume 41, Issue 6, pp 615-622

HPLC method for quantification and characterization of cholesterol and its oxidation products in eggs

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Abstract

A new method was developed for the simultaneous determination of cholesterol and its oxidation products in eggs, using HPLC with UV and refractive index (RI) detectors, and HPLC interfaced with atmospheric pressure chemical ionization coupled to MS (HPLC-APCI-MS). The best conditions for direct saponification of the sample and extraction of the nonsaponifiable material were defined using complete factorial designs with central points. The method showed accuracy and precision with a detection limit between 0.002 and 0.079 μg/g. The oxides cholest-5-ene-3β, 20α-diol identified by HPLC-UV-RI were not confirmed by HPLC-APCI-MS.