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- W2063455296 abstract "HPLC was used to analyze the content of ascorbic acid (AA) in tubers of four Korean potato cultivars (Chaju, Sumi, Deso, and Dejima), in a series of baked, boiled, braised, fried, microwaved, pressure-cooked, and sautéed potato slices from the Dejima cultivar and in 14 commercial Korean and 14 processed potato foods sold in the United States (chips, snacks, mashed potatoes, fries). The AA content for the four cultivars ranged from 16 to 46 mg/100 g of fresh weight. The distribution of AA in each of the eight potato slices (sticks, plugs) cut horizontally from the stem end of the Dejima potato ranged from 6.8 to 19.3% of the total. The corresponding distribution in seven sticks cut vertically was much narrower, ranging from 11.7 to 17.5% of the total. Losses of AA in water (pH 5.2) were significantly greater than in 5% metaphosphoric acid (pH 1.0). Less degradation occurred in water solutions of the vitamin stored at 1 °C than at 25 °C. Losses of AA observed during home-processing of three varieties with low (Dejima, 16 mg/100 g), intermediate (Sumi, 32 mg/100 g), and high (Chaju, 42 mg/100 g) AA contents were as follows: boiling in water, 77−88%; boiling in water containing 1−3% NaCl, 61−79%; frying in oil, 55−79%; sautéing, 61−67%; pressure-cooking in water, 56−60%; braising, 50−63%; baking, 33−51%; and microwaving, 21−33%. The content of the Korean foods ranged from trace amounts to 25 mg/100 g and that of the U.S. foods from 0.4 to 46 mg/100 g. These results permit optimization of the vitamin C content of the diet by (a) using high-vitamin C potato varieties such as Chaju, (b) selecting sticks cut horizontally for frying, (c) baking or microwaving rather than boiling or frying, and (d) selecting commercial potato foods with a high vitamin C content. Keywords: Ascorbic acid; vitamin C; HPLC; potatoes; degradation; food processing" @default.
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- W2063455296 date "2004-09-18" @default.
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- W2063455296 title "Distribution of Ascorbic Acid in Potato Tubers and in Home-Processed and Commercial Potato Foods" @default.
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- W2063455296 doi "https://doi.org/10.1021/jf0493270" @default.
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