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- W2323243879 abstract "Carotenoids and chlorophylls are photosynthetic compounds and also efficient antioxidants. This study aims to identify and quantify carotenoids and chlorophylls in some vegetables (carrot, tomato, spinach), to measure the total antioxidant capacity (TAC) of these samples with two spectrophotometric methods, to correlate TAC data with carotenoid structure, and to compare the TAC results with HPLC findings. Separation of the individual antioxidant pigments was achieved on a C30 column using a developed gradient elution program involving methanol-acetonitrile (50:50, v/v) with 0.1% (v/v) triethylamine (TEA) (A) and acetone (B) mobile phases. Total antioxidant capacities of the acetone extracts of studied samples, in trolox and β-carotene equivalents, were in the order: spinach > tomato > carrot by both CUPRAC and ABTS methods. CUPRAC responded favorably to both chlorophylls a and b. The TAC calculated with aid of combined HPLC-spectrophotometry was very close to the spectrophotometric value (93-108%) for real samples and synthetic mixtures." @default.
- W2323243879 created "2016-06-24" @default.
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- W2323243879 date "2013-11-13" @default.
- W2323243879 modified "2023-10-14" @default.
- W2323243879 title "Spectrophotometric and Chromatographic Assessment of Contributions of Carotenoids and Chlorophylls to the Total Antioxidant Capacities of Plant Foods" @default.
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- W2323243879 doi "https://doi.org/10.1021/jf403356h" @default.
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