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A simple method for the simultaneous extraction and HPLC determination of provitamin A and vitamin E derivatives in vitamin supplemented (ATBC) drinks has been developed. The method allowed the complete separation of α-, β-, γ-, and δ-tocopherol, α-tocopheryl acetate, all-trans-α-carotene, all-trans-β-carotene, and the 9-cis and 13-cis isomers of β-carotene in less than 50 min. Recovery of analytes...
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