Browsing by Author "Gaibor Angulo, Marissa Antonella"

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    Análisis de la presencia de metales pesados en la concha negra (Anadara tuberculosa) expendida en los mercados de la ciudad de Ambato y su cumplimiento con los límites establecidos en la normativa alimentaria
    (Universidad Técnica de Ambato. Facultad de Ciencia e Ingeniería en Alimentos y Biotecnología. Carrera de Alimentos, 2025-02) Gaibor Angulo, Marissa Antonella; Peñafiel Ayala, Rodny David
    The determination of heavy metals in black shells (Anadara tuberculosa) makes them a very important marine resource in coastal ecosystems and for human consumption to assess environmental and health risks. Heavy metals such as Arsenic (As), Nickel (Ni), Lead (Pb), Cadmium (Cd), Chromium (Cr), can accumulate in the soft tissues of this species, because it has a filtering capacity since it is exposed to contaminated waters either by anthropogenic activities such as mining, agriculture and industrial and urban discharges. For the analysis of heavy metals in black shells, it is necessary to collect samples in specific areas. It is vitally important to identify the areas of sale and origin of the product through informal interviews with the sellers. The samples must be prepared for the quantification of heavy metals using the graphite furnace atomic absorption spectrophotometry technique. The results obtained after using the technique are compared with international and local regulations, such as those of the European Communities and the CODEX, with evidence that the limits of heavy metals obtained in the analysis are below the limits established by the regulations, however, the presence of these metals is not ruled out. The evaluation of the toxicological risk allows the identification and quantification of the dangers that are associated with chemical substances, evaluating their impact on human health and the environment by examining a danger in order to avoid or reduce it, where the samples analyzed are below the reference dose, showing that they do not represent a risk to health.