Browsing by Author "Toro Alvarez, Karla Yessenia"

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    Evaluación de la presencia de congéneres en el aguardiente de caña de azúcar producido en la provincia del Azuay
    (Universidad de Cuenca, 2020-06-15) Calvache Guerrero, Karen Estefanía; Toro Alvarez, Karla Yessenia; Vanegas Jácome, David Enrique
    In the alcoholic fermentation of cane juice and its subsequent distillation, together with ethanol, compounds of a volatile nature called congeners are obtained. The NTE INEN for cane brandy assesses the presence of methanol, higher alcohols and furfural. The maximum concentration of these compounds is 10, 150 y 1,5 mg/100 cm3 of absolute alcohol respectively. The objective of this was to optimize an analytical method by gas chromatography with flame ionization detection for the subsequent evaluation of the presence of congeners in 36 samples of cane schnapps from producers registered in MIPRO and from other producers in the province of Azuay. The quantification of the concentration of congeners in the analyzed samples was carried out by the internal standardization method using tert-butanol as internal standard. The order of elution of the compounds were methanol, isopropanol, and furfural with average retention times of 4.92 ± 0.01 min., 6.82 ± 0.01 min., and 18.46 ± 0.004 min, respectively. In general, low percentages of congenital contamination were found in cane brandy. In the samples from small producers, only one sample was found with a detectable level of methanol (5.5%), while in 44.4% of the producer samples that are included and not in the MIPRO, isopropanol was found at quantifiable levels and two samples (5.5%) were contaminated with furfural.