Determinação de metodologia analítica para determinação de metais em hortaliças

• Autor(a) principal: Procópio, Nathalia da Silva
• Data de Publicação: 2019
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/15658
• topic: Food; Vegetables; Rio de Janeiro; Metals; Alimentação; Hortaliças; Rio de Janeiro; Metais; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA

A diet is related to human health and studies prove that a healthy diet can reduces the incidence of various diseases such as obesity, diabetes, cardiovascular diseases and even cancers. Vegetables are very present in Brazilians' life and the consumption of these foods is essential for a good nutrition, because they are a main source of nutrients for the human body. However, when contaminated for example with metals or agricultural pesticides, they can cause adverse effects on the human body. The presence of large urban and industrial centers in Rio de Janeiro results in a greater contamination of the air, water and soils and makes a quality of vegetables produced in Rio de Janeiro be worrisome. Some metals, such as calcium and zinc, are essential to the functioning of human body, but lack or excess are prejudice to human's health. However, other metals, such as lead, cadmium and mercury, known as heavy metals, when ingested or inhaled by humans or animals in low concentrations, can cause intoxication. This study analyzed the quality of vegetables, such as lettuce and chard, marketed and consumed by the population of Rio de Janeiro through a monitoring of samples stored on the streets of the state in differents seasons of the year. The monitoring was carried out in four stages: the collection of samples of vegetables in a fair; drying by freeze-drying, wet dissolution using microwave oven and the determination of metals using flame atomic absorption spectrometry. The analysis revealed that there may be a correlation between the quantity of iron and manganese metals and the seasons of the year and also that some of the concentrations of copper, chromium and zinc metals observed in the work exceeded the limits established by ANVISA.