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The aim of the research was to evaluate the content of the bioactives compounds in purple corn cob (Zea mays L.) of three differents regions of Peru. The samples were obtained in Lima, Cajamarca and Abancay and the total polyphenols, flavonoids, anthocyanins and cyanidin-3-glucoside content were determined. The extracts were obtained with etanol to 20 %, pH 2, in a ratio of corn cob: solvent 1:100 (p/v) at a temperature of 70 °C for 30 minutes. *a Facultad de Química e Ingeniería Química, UNMSM, Ciudad Universitaria, Av. Venezuela. Lima-Perú. maria_ jlas@yahoo.com b Centro de Investigación de Bioquímica y Nutrición, Facultad de Medicina, UNMSM, Jr. Puno. Lima-Perú. Estudio comparativo del contenido de compuestos bioactivos y cianidina-3glucósido del maíz morado... 207 Rev Soc Quím Perú. 85(2) 2019 The results of total anthocyanins were between 24,4 to 42,6 mg/g, the total polyphenols were in the range 67,9 to 94,1 μg/mg expressed as gallic acid equivalent (GAE) and the flavonoids between 3,1 to 4,4 μg/mg expressed as quercetin equivalent (QE). The cyanidin3-glucoside content varied in the range from 9,5 to 18,5 mg/g and was determined by high performance liquid chromatography (HPLC). There are significant differences in the content of the bioactives compounds according to the origin of the sample, and that of Lima (Cañete) present the highest value of polyphenols (94,1 μg GAE/mg), flavonoids (4,4 μg QE/mg) total anthocyanins (42,6 mg/g) y cyanidin-3-glucoside (18,5 mg/g).

ESTUDIO COMPARATIVO DEL CONTENIDO DE COMPUESTOS BIOACTIVOS Y CIANIDINA-3- GLUCÓSIDO DEL MAÍZ MORADO (Zea mays L.) DE TRES REGIONES DEL PERÚ