Abstract：
:Carotenoids and tocopherols from botanical species abundant in Atlantic mountain grasslands were simultaneously extracted using one-step solid-liquid phase. A single n-hexane/2-propanol extract containing both types of compounds was injected twice under two different sets of HPLC conditions to separate the tocopherols by normal-phase chromatography and carotenoids by reverse-phase mode. The method allowed reproducible quantification in plant samples of very low amounts of α-, β-, γ- and δ-tocopherols (LOD from 0.0379 to 0.0720 μg g(-1) DM) and over 15 different xanthophylls and carotene isomers. The simplified one-step extraction without saponification significantly increased the recovery of tocopherols and carotenoids, thereby enabling the determination of α-tocopherol acetate in plant samples. The two different sets of chromatographic analysis provided near baseline separation of individual compounds without interference from other lipid compounds extracted from plants, and a very sensitive and accurate detection of tocopherols and carotenoids. The detection of minor individual components in botanical species from grasslands is nowadays of high interest in searching for biomarkers for foods derived from grazing animals.
journal_name
Food Chemjournal_title
Food chemistryauthors
Valdivielso I,Bustamante MÁ,Ruiz de Gordoa JC,Nájera AI,de Renobales M,Barron LJdoi
10.1016/j.foodchem.2014.10.090subject
Has Abstractpub_date
2015-04-15 00:00:00pages
709-17eissn
0308-8146issn
1873-7072pii
S0308-8146(14)01652-5journal_volume
173pub_type
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