Examinando por Materia "Mercosur"

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Acceso abierto
Cuantificación de plomo, cadmio y arsénico en granos de cacao Theobroma cacao L. y café Coffea arábica L. de la zona de Jaén – Cajamarca durante el periodo febrero–julio 2018
(Universidad Privada Norbert Wiener, 2018-12-06) Condezo Nuñez, Silvia; Huaraca Mezones, Carmen Victoria; Lizano Gutiérrez, Jesús Víctor
Coffee and cocoa are consumed worldwide and have gained international recognition. Many producers cultivate these crops using pesticides, or the soils in which they are grown are contaminated with heavy metals that can be absorbed by the plants. For this reason, it was necessary to quantify the concentrations of lead, cadmium, and arsenic in cocoa beans (Theobroma cacao L.) and coffee beans (Coffea arabica L.) from the Jaén – Cajamarca region, during the period from February to July 2018. A total of sixteen samples were collected and analyzed using the atomic absorption method associated with graphite furnace and FIAS hydride generation. The results showed that in coffee beans from the Jaén – Cajamarca region, the average concentrations were 0.11 µg/g for arsenic, 0.11 µg/g for cadmium, and 1.18 µg/g for lead. Most of the analyzed samples did not exceed the maximum values permitted by MERCOSUR regulations, making them suitable for consumption. In cocoa beans from the Jaén – Cajamarca region, the average concentrations were 0.08 µg/g for arsenic, 0.07 µg/g for cadmium, and 0.10 µg/g for lead. When compared with the permissible values established by the Codex Alimentarius, the concentrations of each metal found indicated that more than 60% of the samples are admissible for human consumption.
Acceso abierto
Determinación cuantitativa de arsénico, cadmio y plomo en maca (Lepidium meyenii) expendida en el mercado 10 de Octubre durante el período de junio–octubre 2016
(Universidad Privada Norbert Wiener, 2016) Espinoza Dominguez, Judith; Quispe Huillca, Yessica; Lizano Gutiérrez, Jesús Víctor
Maca (Lepidium meyenii) is a plant that grows above 4000 meters of altitude in the Central Andes of Peru, presenting different varieties based on the color of its hypocotyl. For this reason, we conducted a study on 28 samples to quantitatively determine the concentration of Arsenic (As), Cadmium (Cd), and Lead (Pb) in maca (Lepidium meyenii) sold in the Mercado 10 de Octubre during the period of June–October 2016. The average concentration of Arsenic was 0.38 mg/kg with minimum figures of 0.17 mg/kg and maximum figures of 0.67 mg/kg. The average concentration of Cadmium was 0.32 mg/kg with minimum figures of 0.06 mg/kg and maximum figures of 0.62 mg/kg. The average concentration of Lead was 0.34 mg/kg with minimum figures of 0.12 mg/kg and maximum figures of 0.67 mg/kg. The values found were: 29% of the analyzed maca (Lepidium meyenii) samples exceeded the limit permitted by MERCOSUR for As (0.50 mg/kg). 14% of the Cd concentrations in maca exceeded the permitted value given by MERCOSUR for Cd (0.50 mg/kg), and 29% of the analyzed samples exceeded the permitted value given by MERCOSUR for Pb.