Determination of some functional and sensory attributes and suitability of colored- and noncolored-flesh potatoes for different cooking methods
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2020Metadata
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Silveira, Ana Cecilia
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Determination of some functional and sensory attributes and suitability of colored- and noncolored-flesh potatoes for different cooking methods
Abstract
Twenty-two colored-flesh potatoes and three commercial noncolored-flesh varieties - which were all raw as they were microwaved (800 W, 8 min) and fried (180 degrees C, 5 min) - were characterized in terms of functional, sensory aspects and suitability for use. Twelve genetic samples were more suitable for frying (> 20% dry matter), four for boiling (similar to 15-18% dry matter) and nine for preparing puree or roasting (similar to 18 to 20% dry matter). The total polyphenol content (TPC) of the raw colored-flesh potatoes contained between 1.10 to 3.68 g of gallic acid equivalent kg(-1) in fresh weight (FW), which was between twoand three-fold higher than the measured values in noncolored-flesh varieties. The total antioxidant capacity (TAC) was between 1.00 to 4.71 g of Trolox equivalent kg(-1) FW, which was also lower in noncolored-flesh potatoes. The cooking process (frying and microwave) did not affect the TPC in most of the genetic samples analyzed, but it reduced the TAC by 40-75% (fried) and 30-90% (microwaved). According to sensory evaluation results, the genetic samples R2, R19, R3 and R5 were suitable for frying, while R16, R21, R9, R15 and R22 were suitable for microwaving. Colored-flesh potatoes are an interesting alternative for consumers due to their greater phytochemical content.
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Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
CONICYT FONDECYT
3130363
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Food Sci. Technol, Campinas, 40(Suppl. 2): 395-404, December 2020
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