Determinación microbiológica y de metales pesados en jugos de alfalfa (Medicago sativa) usado en la preparación de jugos naturales de fruta, expendidos en los diferentes mercados del Distrito Metropolitano de Quito

The natural juice of alfalfa is a popular mixture in Ecuador that is used with medicinal and nutritional purposes. The plant has properties like antihemostatic, appetite stimulant among other uses (Ríos, Koziol, Pedersen, & Granda, 2007). This product is distributed through the metropolitan system of commercialization, but it isn’t has researches which assure its quality. Considering it, we chose the 50% of the metropolitan district territory and found 29 markets that spend process food included this product. With the obtained samples, we realized a chemical composition analysis; it showed that the juices had normal physicochemical characteristics, but they also had pH ranges that prejudice their stability. Furthermore, we realized a determination of two pollutants; they were heavy metals and microorganism. In the first analysis, we found traces of cadmium, cooper and nickel; besides, we found large amounts of lead, an average of 2,6874 mg/Kg. It quantity outpoint national limits. Also, we found a lot of mesophilic microorganisms per cc in all the samples; these amounts exceed the Ecuadorian standard for juices and natural preparations. In addition the 24% of samples had parasitic microorganisms and helminthes. These results evinced the mistakes happened in the preparation of this product in all the samples.

• 1. autor: Quishpe Puga, Karina Marisol (author)
• Format: bachelorThesis
• Język: spa
• Wydane: 2016
• Hasła przedmiotowe: BIOTECNOLOGÍA DE LOS RECURSOS NATURALES; MEDICAGO SATIVA; JUGOS DE FRUTAS; MICROBIOLOGÍA
• Dostęp online: https://dspace.ups.edu.ec/handle/123456789/12560