Evaluation of vitamin E by HPLC in a variety of olive-based foodstuffs |
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Authors: | López Antonio Montaño Alfredo Garrido Antonio |
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Affiliation: | (1) Food Biotechnology Department, Instituto de la Grasa (CSIC), Avda. Padre García Tejero, 4, Seville, Spain |
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Abstract: | A survey of vitamin E levels in a wide variety of olive-based foodstuffs was conducted. Vitamin E was determined by normal-phase
HPLC. The only form of vitamin E found in all commercial presentations of table olives was α-tocopherol, with an average content
of 3.1 mg/100 g edible portion. A very low content (<0.4 mg/100 g edible portion) of γ-tocopherol was found in most of the
samples analyzed. The main sources of variation of vitamin E were olive cultivars and commercial presentations. Processing
type (Spanish style green olives, directly brined olives, ripe olives) had a limited influence. Irrespective of the elaboration
style, the Gordal cultivar was the poorest with respect to the vitamin E content. On the other hand, all commercial presentations
based on the Hojiblanca cultivar had high contents of vitamin E. The results of this study may be used by the industry for
requirements of nutritional labeling or by nutritionists to estimate vitamin E intakes in diets that include table olives. |
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Keywords: | Directly brined olives HPLC olive cultivars ripe olives Spanish-style green olives table olives α -tocopherol γ -tocopherol vegetable products vitamin E |
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